[BUGFIX beta] Update HTMLBars to 0.14.7.

Compare view:
tildeio/htmlbars@v0.14.6...v0.14.7

Main issue fixed is for Android 4.0/4.1 builtin browser throwing errors
in non-minified builds (due to unquoted usage of `yield`).

Author: rwjblue

npm-shrinkwrap.json

@@ -33,7 +33,7 @@
     "finalhandler": "^0.4.0",
     "github": "^0.2.3",
     "glob": "~4.3.2",
-    "htmlbars": "0.14.6",
+    "htmlbars": "0.14.7",
     "qunit-extras": "^1.4.0",
     "qunitjs": "^1.19.0",
     "route-recognizer": "0.1.5",