Update ESLint to v2.11.1 (latest stable) (#20068)

Fixes #19908

[skip sauce]
[skip validator]

js/.eslintrc.json

@@ -45,6 +45,7 @@
         "no-unexpected-multiline": "error",
         "no-unreachable": "error",
         "no-useless-escape": "error",
+        "no-useless-rename": "error",
         "use-isnan": "error",
         "valid-jsdoc": "off",
         "valid-typeof": "error",
@@ -102,6 +103,7 @@
         "no-warning-comments": "off",
         "no-with": "error",
         "radix": "error",
+        "unicode-bom": ["error", "never"],
         "vars-on-top": "off",
         "wrap-iife": "error",
         "yoda": "error",