Bump jshint from 2.11.1 to 2.12.0 (#640)

Bumps [jshint](https://github.com/jshint/jshint) from 2.11.1 to 2.12.0.
- [Release notes](https://github.com/jshint/jshint/releases)
- [Changelog](https://github.com/jshint/jshint/blob/master/CHANGELOG.md)
- [Commits](jshint/jshint@2.11.1...2.12.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

package-lock.json

@@ -44,7 +44,7 @@
     "type-is": "1.6.18"
   },
   "devDependencies": {
-    "jshint": "2.11.1",
+    "jshint": "2.12.0",
     "mocha": "5.2.0",
     "should": "13.2.3",
     "sinon": "7.5.0"