Bump grunt from 0.4.5 to 1.5.3

Bumps [grunt](https://github.com/gruntjs/grunt) from 0.4.5 to 1.5.3.
- [Release notes](https://github.com/gruntjs/grunt/releases)
- [Changelog](https://github.com/gruntjs/grunt/blob/main/CHANGELOG)
- [Commits](gruntjs/grunt@v0.4.5...v1.5.3)

---
updated-dependencies:
- dependency-name: grunt
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package.json

@@ -39,7 +39,7 @@
     "awesome-typescript-loader": "^3.4.1",
     "chai": "2.0.0",
     "circle-github-bot": "^2.1.0",
-    "grunt": "~0.4.5",
+    "grunt": "~1.5.3",
     "grunt-blanket-mocha": "^1.0.0",
     "grunt-bump": "0.7.0",
     "grunt-cli": "0.1.13",