move timeago.js to vendor directory

app/assets/javascripts/application.js

@@ -19,6 +19,7 @@
 /*= require jquery.scrollTo */
 /*= require jquery.turbolinks */
 /*= require js.cookie */
+/*= require timeago */
 /*= require turbolinks */
 /*= require autosave */
 /*= require bootstrap/affix */

app/assets/javascripts/lib/utils/timeago.js → vendor/assets/javascripts/timeago.js

-/* eslint-disable no-unused-expressions, wrap-iife, func-names, curly, no-param-reassign, no-trailing-spaces, prefer-arrow-callback, no-var, one-var, quote-props, space-before-function-paren, vars-on-top, radix, prefer-template, space-infix-ops, no-use-before-define, newline-per-chained-call, no-useless-escape, no-nested-ternary, indent, no-undef, no-plusplus, one-var-declaration-per-line, operator-assignment, consistent-return, keyword-spacing, max-len, space-unary-ops, no-shadow, no-restricted-syntax, guard-for-in, eol-last, max-len */
-
 /**
  * Copyright (c) 2016 hustcc
  * License: MIT