Re-use solhint configuration

contracts/extensions/.solhint.json

@@ -1,20 +0,0 @@
-{
-    "extends": "default",
-    "rules": {
-        "avoid-low-level-calls": false,
-        "avoid-tx-origin": "warn",
-        "bracket-align": false,
-        "code-complexity": false,
-        "const-name-snakecase": "error",
-        "expression-indent": "error",
-        "function-max-lines": false,
-        "func-order": "error",
-        "indent": ["error", 4],
-        "max-line-length": ["warn", 160],
-        "no-inline-assembly": false,
-        "quotes": ["error", "double"],
-        "separate-by-one-line-in-contract": "error",
-        "space-after-comma": "error",
-        "statement-indent": "error"
-    }
-}

contracts/extensions/package.json

@@ -30,7 +30,7 @@
         "profiler:report:html": "istanbul report html && open coverage/index.html",
         "coverage:report:lcov": "istanbul report lcov",
         "test:circleci": "yarn test",
-        "lint-contracts": "solhint contracts/**/**/**/**/*.sol"
+        "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
     },
     "config": {
         "abis": "generated-artifacts/@(DutchAuction|Forwarder|OrderValidator).json"
@@ -66,7 +66,7 @@
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
         "solc": "^0.4.24",
-        "solhint": "^1.2.1",
+        "solhint": "^1.4.1",
         "tslint": "5.11.0",
         "typescript": "3.0.1",
         "yargs": "^10.0.3"