Update CodeMirror to version 5.49.0 (#8381)

* Update CodeMirror to version 5.49.0

* Update CodeMirror versions in librejs and VERSIONS

public/vendor/plugins/codemirror/addon/lint/coffeescript-lint.js

@@ -0,0 +1,47 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+// Depends on coffeelint.js from http://www.coffeelint.org/js/coffeelint.js
+
+// declare global: coffeelint
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+"use strict";
+
+CodeMirror.registerHelper("lint", "coffeescript", function(text) {
+  var found = [];
+  if (!window.coffeelint) {
+    if (window.console) {
+      window.console.error("Error: window.coffeelint not defined, CodeMirror CoffeeScript linting cannot run.");
+    }
+    return found;
+  }
+  var parseError = function(err) {
+    var loc = err.lineNumber;
+    found.push({from: CodeMirror.Pos(loc-1, 0),
+                to: CodeMirror.Pos(loc, 0),
+                severity: err.level,
+                message: err.message});
+  };
+  try {
+    var res = coffeelint.lint(text);
+    for(var i = 0; i < res.length; i++) {
+      parseError(res[i]);
+    }
+  } catch(e) {
+    found.push({from: CodeMirror.Pos(e.location.first_line, 0),
+                to: CodeMirror.Pos(e.location.last_line, e.location.last_column),
+                severity: 'error',
+                message: e.message});
+  }
+  return found;
+});
+
+});