Use dev for optional development dependencies

.github/workflows/testing.yml

@@ -30,7 +30,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install .[development]
+        python -m pip install .[dev]
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names

pyproject.toml

@@ -39,7 +39,7 @@ version = {attr = "gns3server.version.__version__"}
 dependencies = {file = "requirements.txt"}
 
 [tool.setuptools.dynamic.optional-dependencies]
-development = {file = ['dev-requirements.txt']}
+dev = {file = ['dev-requirements.txt']}
 
 [project.urls]
 "Homepage" = "http://gns3.com"