infra: enable no-this-before-super eslint rule (#3256)

Author: qwerty541

.eslintrc.json

@@ -156,7 +156,7 @@
         // "no-class-assign": "error",
         // "no-const-assign": "error",
         // "no-dupe-class-members": "error",
-        // "no-this-before-super": "error",
+        "no-this-before-super": "error",
         // "no-var": "warn",
         "object-shorthand": [ "warn" ],
         // "prefer-arrow-callback": "warn",