common/defs: add bitcoin_regtest support (#43)

common/defs/bitcoin/bitcoin_regtest.json

@@ -0,0 +1,40 @@
+{
+  "coin_name": "Regtest",
+  "coin_shortcut": "REGTEST",
+  "coin_label": "Regtest",
+  "website": "https://bitcoin.org",
+  "github": "https://github.com/bitcoin/bitcoin",
+  "maintainer": "Thomas Kerin <me@thomaskerin.io>",
+  "curve_name": "secp256k1",
+  "address_type": 111,
+  "address_type_p2sh": 196,
+  "maxfee_kb": 10000000,
+  "minfee_kb": 1000,
+  "signed_message_header": "Bitcoin Signed Message:\n",
+  "hash_genesis_block": "0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206",
+  "xprv_magic": 70615956,
+  "xpub_magic": 70617039,
+  "xpub_magic_segwit_p2sh": 71979618,
+  "xpub_magic_segwit_native": 73342198,
+  "bech32_prefix": "bcrt",
+  "cashaddr_prefix": null,
+  "slip44": 1,
+  "segwit": true,
+
+  "decred": false,
+  "fork_id": null,
+  "force_bip143": false,
+  "bip115": false,
+  "default_fee_b": {
+    "Normal": 10
+  },
+  "dust_limit": 546,
+  "blocktime_seconds": 600,
+  "uri_prefix": "bitcoin",
+  "min_address_length": 27,
+  "max_address_length": 34,
+  "bitcore": [],
+  "blockbook": [],
+  "cooldown": 100,
+  "consensus_branch_id": null
+}