bump codemirror to newest

They fixed the bug for which it was limited.

package.json

@@ -30,7 +30,7 @@
     "@ambers/contrib-web": ">=0.6.0",
     "@ambers/lang": ">0.23.0",
     "bootstrap": "^3.3.7",
-    "codemirror": ">=5.39.2 <5.43.0",
+    "codemirror": ">=5.44.0",
     "es6-promise": "^4.2.4",
     "jquery-ui-dist": ">=1.9.2",
     "require-css": "^0.1.10",