Add a function for waiting for linters to complete, and add a test which checks that linting updates the loclist.

.eslintrc.js

@@ -0,0 +1,11 @@
+module.exports = {
+    parserOptions: {
+        ecmaVersion: 6,
+        sourceType: "module",
+    },
+    rules: {
+        semi: 'error',
+        'space-infix-ops': 'warn',
+        radix: 'error',
+    }
+}