Bump grunt-wrap from 0.2.0 to 0.3.1 in /js

Bumps [grunt-wrap](https://github.com/chrissrogers/grunt-wrap) from 0.2.0 to 0.3.1.
- [Release notes](https://github.com/chrissrogers/grunt-wrap/releases)
- [Commits](https://github.com/chrissrogers/grunt-wrap/commits)

---
updated-dependencies:
- dependency-name: grunt-wrap
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

js/package.json

@@ -29,7 +29,7 @@
     "grunt-newer": "~1.1.1",
     "grunt-phpdocumentor": "^0.4.1",
     "grunt-phpunit": "0.2.0",
-    "grunt-wrap": "~0.2.0",
+    "grunt-wrap": "~0.3.1",
     "phantomjs": "~1.8.1-3"
   },
   "engine": "node >= 0.8"