New rule: no-const-assign

http://eslint.org/docs/rules/no-const-assign

Author: feross

eslintrc.json

@@ -65,6 +65,7 @@
     "no-comma-dangle": 0,
     "no-cond-assign": 2,
     "no-console": 0,
+    "no-const-assign": 2,
     "no-constant-condition": 0,
     "no-continue": 0,
     "no-control-regex": 2,