Bug 1557413 - add a fix:eslint target to package.json

package.json

@@ -143,6 +143,8 @@
     "tdd": "npm run tddmc",
     "vendor": "npm-run-all vendor:*",
     "vendor:react": "node ./bin/vendor-react.js",
+    "fix": "npm-run-all fix:*",
+    "fix:eslint": "npm run lint:eslint -- --fix",
     "help": "yamscripts help",
     "yamscripts": "yamscripts compile",
     "__": "# NOTE: THESE SCRIPTS ARE COMPILED!!! EDIT yamscripts.yml instead!!!"

yamscripts.yml

@@ -83,3 +83,8 @@ scripts:
   # Utility scripts for use when vendoring in Node packages
   vendor:
     react: node ./bin/vendor-react.js
+
+  fix:
+    # Note that since we're currently running eslint-plugin-prettier,
+    # running fix:eslint will also reformat changed JS files using prettier.
+    eslint: =>lint:eslint -- --fix