diff --git a/package.json b/package.json
index 440f3656..bb1e775e 100644
--- a/package.json
+++ b/package.json
@@ -80,8 +80,7 @@
         "babel-preset-jest": "^23.2.0",
         "babel-preset-react": "^6.24.1",
         "css-loader": "0.28.11",
-        "duplicate-package-checker-webpack-plugin": "^3.0.0",
-        "eslint": "^5.3.0",
+        "eslint": "^4",
         "eslint-config-airbnb": "^17.0.0",
         "eslint-import-resolver-babel-module": "^4.0.0",
         "eslint-plugin-flowtype": "^2.50.0",
diff --git a/webpack/config.dev.babel.js b/webpack/config.dev.babel.js
index fa186a2a..c96f7bc2 100644
--- a/webpack/config.dev.babel.js
+++ b/webpack/config.dev.babel.js
@@ -1,4 +1,3 @@
-import DuplicatePackageCheckerPlugin from 'duplicate-package-checker-webpack-plugin';
 import webpack from 'webpack';
 import HtmlWebpackPlugin from 'html-webpack-plugin';
 import MiniCssExtractPlugin from 'mini-css-extract-plugin';
@@ -87,7 +86,6 @@ module.exports = {
             filename: 'index.html',
             inject: true,
         }),
-        new DuplicatePackageCheckerPlugin(),
         new webpack.optimize.OccurrenceOrderPlugin(),
         new webpack.NoEmitOnErrorsPlugin(),
         new webpack.HotModuleReplacementPlugin(),
diff --git a/webpack/config.dev.local.babel.js b/webpack/config.dev.local.babel.js
index 38569b4a..e3506e9c 100644
--- a/webpack/config.dev.local.babel.js
+++ b/webpack/config.dev.local.babel.js
@@ -1,5 +1,4 @@
 import webpack from 'webpack';
-import DuplicatePackageCheckerPlugin from 'duplicate-package-checker-webpack-plugin';
 import HtmlWebpackPlugin from 'html-webpack-plugin';
 import CopyWebpackPlugin from 'copy-webpack-plugin';
 import MiniCssExtractPlugin from 'mini-css-extract-plugin';
@@ -147,7 +146,6 @@ module.exports = {
         new webpack.NoEmitOnErrorsPlugin(),
         new webpack.HotModuleReplacementPlugin(),
         new webpack.NamedModulesPlugin(),
-        new DuplicatePackageCheckerPlugin(),
 
         new webpack.DefinePlugin({
             LOCAL: JSON.stringify(`http://localhost:${PORT}/`),
diff --git a/yarn.lock b/yarn.lock
index 5ee37c96..980756a7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -385,13 +385,17 @@ acorn-globals@^4.1.0:
   dependencies:
     acorn "^5.0.0"
 
-acorn-jsx@^4.1.1:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-4.1.1.tgz#e8e41e48ea2fe0c896740610ab6a4ffd8add225e"
+acorn-jsx@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-3.0.1.tgz#afdf9488fb1ecefc8348f6fb22f464e32a58b36b"
   dependencies:
-    acorn "^5.0.3"
+    acorn "^3.0.4"
+
+acorn@^3.0.4:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-3.3.0.tgz#45e37fb39e8da3f25baee3ff5369e2bb5f22017a"
 
-acorn@^5.0.0, acorn@^5.0.3, acorn@^5.5.3, acorn@^5.6.0, acorn@^5.6.2:
+acorn@^5.0.0, acorn@^5.5.0, acorn@^5.5.3, acorn@^5.6.2:
   version "5.7.1"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.1.tgz#f095829297706a7c9776958c0afc8930a9b9d9d8"
 
@@ -401,6 +405,10 @@ add-dom-event-listener@1.x:
   dependencies:
     object-assign "4.x"
 
+ajv-keywords@^2.1.0:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-2.1.1.tgz#617997fc5f60576894c435f940d819e135b80762"
+
 ajv-keywords@^3.0.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-3.2.0.tgz#e86b819c602cf8821ad637413698f1dec021847a"
@@ -416,7 +424,7 @@ ajv@^4.9.1:
     co "^4.6.0"
     json-stable-stringify "^1.0.1"
 
-ajv@^5.1.0:
+ajv@^5.1.0, ajv@^5.2.3, ajv@^5.3.0:
   version "5.5.2"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-5.5.2.tgz#73b5eeca3fab653e3d3f9422b341ad42205dc965"
   dependencies:
@@ -425,7 +433,7 @@ ajv@^5.1.0:
     fast-json-stable-stringify "^2.0.0"
     json-schema-traverse "^0.3.0"
 
-ajv@^6.0.1, ajv@^6.5.0:
+ajv@^6.0.1:
   version "6.5.2"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.5.2.tgz#678495f9b82f7cca6be248dd92f59bff5e1f4360"
   dependencies:
@@ -776,7 +784,7 @@ babel-cli@^6.24.1:
   optionalDependencies:
     chokidar "^1.6.1"
 
-babel-code-frame@^6.26.0:
+babel-code-frame@^6.22.0, babel-code-frame@^6.26.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-code-frame/-/babel-code-frame-6.26.0.tgz#63fd43f7dc1e3bb7ce35947db8fe369a3f58c74b"
   dependencies:
@@ -2439,6 +2447,15 @@ concat-stream@^1.5.0:
     readable-stream "^2.2.2"
     typedarray "^0.0.6"
 
+concat-stream@^1.6.0:
+  version "1.6.2"
+  resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.6.2.tgz#904bdf194cd3122fc675c77fc4ac3d4ff0fd1a34"
+  dependencies:
+    buffer-from "^1.0.0"
+    inherits "^2.0.3"
+    readable-stream "^2.2.2"
+    typedarray "^0.0.6"
+
 connect-history-api-fallback@^1.3.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/connect-history-api-fallback/-/connect-history-api-fallback-1.5.0.tgz#b06873934bc5e344fef611a196a6faae0aee015a"
@@ -2578,7 +2595,7 @@ cross-spawn@^4.0.0:
     lru-cache "^4.0.1"
     which "^1.2.9"
 
-cross-spawn@^5.0.1:
+cross-spawn@^5.0.1, cross-spawn@^5.1.0:
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-5.1.0.tgz#e8bd0efee58fcff6f8f94510a0a554bbfa235449"
   dependencies:
@@ -3109,15 +3126,6 @@ duplexify@^3.4.2, duplexify@^3.5.3:
     readable-stream "^2.0.0"
     stream-shift "^1.0.0"
 
-duplicate-package-checker-webpack-plugin@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/duplicate-package-checker-webpack-plugin/-/duplicate-package-checker-webpack-plugin-3.0.0.tgz#78bb89e625fa7cf8c2a59c53f62b495fda9ba287"
-  dependencies:
-    chalk "^2.3.0"
-    find-root "^1.0.0"
-    lodash "^4.17.4"
-    semver "^5.4.1"
-
 ecc-jsbn@~0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz#0fc73a9ed5f0d53c38193398523ef7e543777505"
@@ -3233,7 +3241,7 @@ error@^7.0.2:
     string-template "~0.2.1"
     xtend "~4.0.0"
 
-es-abstract@^1.10.0, es-abstract@^1.4.3, es-abstract@^1.5.1, es-abstract@^1.6.1:
+es-abstract@^1.4.3, es-abstract@^1.5.1, es-abstract@^1.6.1:
   version "1.12.0"
   resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.12.0.tgz#9dbbdd27c6856f0001421ca18782d786bf8a6165"
   dependencies:
@@ -3398,6 +3406,13 @@ eslint-scope@3.7.1:
     esrecurse "^4.1.0"
     estraverse "^4.1.1"
 
+eslint-scope@^3.7.1:
+  version "3.7.3"
+  resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-3.7.3.tgz#bb507200d3d17f60247636160b4826284b108535"
+  dependencies:
+    esrecurse "^4.1.0"
+    estraverse "^4.1.1"
+
 eslint-scope@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/eslint-scope/-/eslint-scope-4.0.0.tgz#50bf3071e9338bcdc43331794a0cb533f0136172"
@@ -3405,64 +3420,59 @@ eslint-scope@^4.0.0:
     esrecurse "^4.1.0"
     estraverse "^4.1.1"
 
-eslint-utils@^1.3.1:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/eslint-utils/-/eslint-utils-1.3.1.tgz#9a851ba89ee7c460346f97cf8939c7298827e512"
-
 eslint-visitor-keys@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz#3f3180fb2e291017716acb4c9d6d5b5c34a6a81d"
 
-eslint@^5.3.0:
-  version "5.3.0"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-5.3.0.tgz#53695aca5213968aacdf970ccb231e42a2b285f8"
+eslint@^4:
+  version "4.19.1"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-4.19.1.tgz#32d1d653e1d90408854bfb296f076ec7e186a300"
   dependencies:
-    ajv "^6.5.0"
-    babel-code-frame "^6.26.0"
+    ajv "^5.3.0"
+    babel-code-frame "^6.22.0"
     chalk "^2.1.0"
-    cross-spawn "^6.0.5"
+    concat-stream "^1.6.0"
+    cross-spawn "^5.1.0"
     debug "^3.1.0"
     doctrine "^2.1.0"
-    eslint-scope "^4.0.0"
-    eslint-utils "^1.3.1"
+    eslint-scope "^3.7.1"
     eslint-visitor-keys "^1.0.0"
-    espree "^4.0.0"
-    esquery "^1.0.1"
+    espree "^3.5.4"
+    esquery "^1.0.0"
     esutils "^2.0.2"
     file-entry-cache "^2.0.0"
     functional-red-black-tree "^1.0.1"
     glob "^7.1.2"
-    globals "^11.7.0"
-    ignore "^4.0.2"
+    globals "^11.0.1"
+    ignore "^3.3.3"
     imurmurhash "^0.1.4"
-    inquirer "^5.2.0"
-    is-resolvable "^1.1.0"
-    js-yaml "^3.11.0"
+    inquirer "^3.0.6"
+    is-resolvable "^1.0.0"
+    js-yaml "^3.9.1"
     json-stable-stringify-without-jsonify "^1.0.1"
     levn "^0.3.0"
-    lodash "^4.17.5"
-    minimatch "^3.0.4"
+    lodash "^4.17.4"
+    minimatch "^3.0.2"
     mkdirp "^0.5.1"
     natural-compare "^1.4.0"
     optionator "^0.8.2"
     path-is-inside "^1.0.2"
     pluralize "^7.0.0"
     progress "^2.0.0"
-    regexpp "^2.0.0"
+    regexpp "^1.0.1"
     require-uncached "^1.0.3"
-    semver "^5.5.0"
-    string.prototype.matchall "^2.0.0"
+    semver "^5.3.0"
     strip-ansi "^4.0.0"
-    strip-json-comments "^2.0.1"
-    table "^4.0.3"
-    text-table "^0.2.0"
+    strip-json-comments "~2.0.1"
+    table "4.0.2"
+    text-table "~0.2.0"
 
-espree@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/espree/-/espree-4.0.0.tgz#253998f20a0f82db5d866385799d912a83a36634"
+espree@^3.5.4:
+  version "3.5.4"
+  resolved "https://registry.yarnpkg.com/espree/-/espree-3.5.4.tgz#b0f447187c8a8bed944b815a660bddf5deb5d1a7"
   dependencies:
-    acorn "^5.6.0"
-    acorn-jsx "^4.1.1"
+    acorn "^5.5.0"
+    acorn-jsx "^3.0.0"
 
 esprima@^2.6.0:
   version "2.7.3"
@@ -3480,7 +3490,7 @@ esprima@~4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.0.tgz#4499eddcd1110e0b218bacf2fa7f7f59f55ca804"
 
-esquery@^1.0.1:
+esquery@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/esquery/-/esquery-1.0.1.tgz#406c51658b1f5991a5f9b62b1dc25b00e3e5c708"
   dependencies:
@@ -3715,7 +3725,7 @@ extend@~3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.1.tgz#a755ea7bc1adfcc5a31ce7e762dbaadc5e636444"
 
-external-editor@^2.1.0:
+external-editor@^2.0.4, external-editor@^2.1.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/external-editor/-/external-editor-2.2.0.tgz#045511cfd8d133f3846673d1047c154e214ad3d5"
   dependencies:
@@ -3903,10 +3913,6 @@ find-cache-dir@^1.0.0:
     make-dir "^1.0.0"
     pkg-dir "^2.0.0"
 
-find-root@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/find-root/-/find-root-1.1.0.tgz#abcfc8ba76f708c42a97b3d685b7e9450bfb9ce4"
-
 find-up@^1.0.0:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/find-up/-/find-up-1.1.2.tgz#6b2e9822b1a2ce0a60ab64d610eccad53cb24d0f"
@@ -4200,7 +4206,7 @@ global@^4.3.0:
     min-document "^2.19.0"
     process "~0.5.1"
 
-globals@^11.1.0, globals@^11.7.0:
+globals@^11.0.1, globals@^11.1.0:
   version "11.7.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-11.7.0.tgz#a583faa43055b1aca771914bf68258e2fc125673"
 
@@ -4683,6 +4689,10 @@ ignore-walk@^3.0.1:
   dependencies:
     minimatch "^3.0.4"
 
+ignore@^3.3.3:
+  version "3.3.10"
+  resolved "https://registry.yarnpkg.com/ignore/-/ignore-3.3.10.tgz#0a97fb876986e8081c631160f8f9f389157f0043"
+
 ignore@^3.3.5:
   version "3.3.7"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-3.3.7.tgz#612289bfb3c220e186a58118618d5be8c1bab021"
@@ -4691,10 +4701,6 @@ ignore@^4.0.0:
   version "4.0.5"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-4.0.5.tgz#333535a20325ba4852c4ddb135d47392aa035e6d"
 
-ignore@^4.0.2:
-  version "4.0.6"
-  resolved "https://registry.yarnpkg.com/ignore/-/ignore-4.0.6.tgz#750e3db5862087b4737ebac8207ffd1ef27b25fc"
-
 image-size@~0.5.0:
   version "0.5.5"
   resolved "https://registry.yarnpkg.com/image-size/-/image-size-0.5.5.tgz#09dfd4ab9d20e29eb1c3e80b8990378df9e3cb9c"
@@ -4751,6 +4757,25 @@ ini@^1.3.4, ini@~1.3.0:
   version "1.3.5"
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.5.tgz#eee25f56db1c9ec6085e0c22778083f596abf927"
 
+inquirer@^3.0.6:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-3.3.0.tgz#9dd2f2ad765dcab1ff0443b491442a20ba227dc9"
+  dependencies:
+    ansi-escapes "^3.0.0"
+    chalk "^2.0.0"
+    cli-cursor "^2.1.0"
+    cli-width "^2.0.0"
+    external-editor "^2.0.4"
+    figures "^2.0.0"
+    lodash "^4.3.0"
+    mute-stream "0.0.7"
+    run-async "^2.2.0"
+    rx-lite "^4.0.8"
+    rx-lite-aggregates "^4.0.8"
+    string-width "^2.1.0"
+    strip-ansi "^4.0.0"
+    through "^2.3.6"
+
 inquirer@^5.1.0, inquirer@^5.2.0:
   version "5.2.0"
   resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-5.2.0.tgz#db350c2b73daca77ff1243962e9f22f099685726"
@@ -5069,7 +5094,7 @@ is-regexp@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-regexp/-/is-regexp-1.0.0.tgz#fd2d883545c46bac5a633e7b9a09e87fa2cb5069"
 
-is-resolvable@^1.1.0:
+is-resolvable@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/is-resolvable/-/is-resolvable-1.1.0.tgz#fb18f87ce1feb925169c9a407c19318a3206ed88"
 
@@ -5537,7 +5562,7 @@ js-tokens@^3.0.0, js-tokens@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
 
-js-yaml@^3.11.0, js-yaml@^3.7.0, js-yaml@^3.9.0:
+js-yaml@^3.7.0, js-yaml@^3.9.0, js-yaml@^3.9.1:
   version "3.12.0"
   resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.12.0.tgz#eaed656ec8344f10f527c6bfa1b6e2244de167d1"
   dependencies:
@@ -8159,15 +8184,9 @@ regex-not@^1.0.0, regex-not@^1.0.2:
     extend-shallow "^3.0.2"
     safe-regex "^1.1.0"
 
-regexp.prototype.flags@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/regexp.prototype.flags/-/regexp.prototype.flags-1.2.0.tgz#6b30724e306a27833eeb171b66ac8890ba37e41c"
-  dependencies:
-    define-properties "^1.1.2"
-
-regexpp@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-2.0.0.tgz#b2a7534a85ca1b033bcf5ce9ff8e56d4e0755365"
+regexpp@^1.0.1:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-1.1.0.tgz#0e3516dd0b7904f413d2d4193dce4618c3a689ab"
 
 regexpu-core@^1.0.0:
   version "1.0.0"
@@ -8494,6 +8513,16 @@ run-queue@^1.0.0, run-queue@^1.0.3:
   dependencies:
     aproba "^1.1.1"
 
+rx-lite-aggregates@^4.0.8:
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/rx-lite-aggregates/-/rx-lite-aggregates-4.0.8.tgz#753b87a89a11c95467c4ac1626c4efc4e05c67be"
+  dependencies:
+    rx-lite "*"
+
+rx-lite@*, rx-lite@^4.0.8:
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/rx-lite/-/rx-lite-4.0.8.tgz#0b1e11af8bc44836f04a6407e92da42467b79444"
+
 rxjs@^5.4.2, rxjs@^5.5.2:
   version "5.5.10"
   resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-5.5.10.tgz#fde02d7a614f6c8683d0d1957827f492e09db045"
@@ -9016,16 +9045,6 @@ string-width@^2.0.0, string-width@^2.1.0, string-width@^2.1.1:
     is-fullwidth-code-point "^2.0.0"
     strip-ansi "^4.0.0"
 
-string.prototype.matchall@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/string.prototype.matchall/-/string.prototype.matchall-2.0.0.tgz#2af8fe3d2d6dc53ca2a59bd376b089c3c152b3c8"
-  dependencies:
-    define-properties "^1.1.2"
-    es-abstract "^1.10.0"
-    function-bind "^1.1.1"
-    has-symbols "^1.0.0"
-    regexp.prototype.flags "^1.2.0"
-
 string.prototype.padend@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/string.prototype.padend/-/string.prototype.padend-3.0.0.tgz#f3aaef7c1719f170c5eab1c32bf780d96e21f2f0"
@@ -9116,7 +9135,7 @@ strip-indent@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/strip-indent/-/strip-indent-2.0.0.tgz#5ef8db295d01e6ed6cbf7aab96998d7822527b68"
 
-strip-json-comments@^2.0.1, strip-json-comments@~2.0.1:
+strip-json-comments@~2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/strip-json-comments/-/strip-json-comments-2.0.1.tgz#3c531942e908c2697c0ec344858c286c7ca0a60a"
 
@@ -9288,7 +9307,18 @@ symbol-tree@^3.2.2:
   version "3.2.2"
   resolved "https://registry.yarnpkg.com/symbol-tree/-/symbol-tree-3.2.2.tgz#ae27db38f660a7ae2e1c3b7d1bc290819b8519e6"
 
-table@^4.0.1, table@^4.0.3:
+table@4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/table/-/table-4.0.2.tgz#a33447375391e766ad34d3486e6e2aedc84d2e36"
+  dependencies:
+    ajv "^5.2.3"
+    ajv-keywords "^2.1.0"
+    chalk "^2.1.0"
+    lodash "^4.17.4"
+    slice-ansi "1.0.0"
+    string-width "^2.1.1"
+
+table@^4.0.1:
   version "4.0.3"
   resolved "https://registry.yarnpkg.com/table/-/table-4.0.3.tgz#00b5e2b602f1794b9acaf9ca908a76386a7813bc"
   dependencies:
@@ -9353,7 +9383,7 @@ test-exclude@^4.2.1:
     read-pkg-up "^1.0.1"
     require-main-filename "^1.0.1"
 
-text-table@^0.2.0:
+text-table@^0.2.0, text-table@~0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"