Run linter as part of the test script

Author: afcapel

.eslintrc

@@ -10,7 +10,7 @@
     "dot-notation": ["error"],
     "eol-last": ["error"],
     "getter-return": ["error"],
-    "id-length": ["error", { "properties": "never", "exceptions": ["_", "i", "n"] }],
+    "id-length": ["error", { "properties": "never", "exceptions": ["_", "i", "j", "n"] }],
     "keyword-spacing": ["error"],
     "no-extra-parens": ["error"],
     "no-multi-spaces": ["error", { "exceptions": { "VariableDeclarator": true } }],

package.json

@@ -51,6 +51,8 @@
     "build": "rollup -c",
     "build-css": "node-sass --functions=./assets/trix/stylesheets/functions assets/trix.scss dist/trix.css",
     "watch": "rollup -c -w",
+    "lint": "eslint .",
+    "pretest": "yarn run lint && yarn run build",
     "test": "yarn run build && karma start"
   },
   "dependencies": {}