bump codemirror to newest

They fixed the bug for which it was limited.

package.json

@@ -29,7 +29,7 @@
   "dependencies": {
     "@ambers/contrib-web": ">=0.6.0",
     "@ambers/lang": ">0.23.0",
-    "codemirror": ">=5.39.2 <5.43.0",
+    "codemirror": ">=5.44.0",
     "jquery-ui-dist": ">=1.9.2",
     "require-css": "^0.1.10"
   },