Bump grunt from 1.3.0 to 1.5.3 (#239)

Bumps [grunt](https://github.com/gruntjs/grunt) from 1.3.0 to 1.5.3.
- [Release notes](https://github.com/gruntjs/grunt/releases)
- [Changelog](https://github.com/gruntjs/grunt/blob/main/CHANGELOG)
- [Commits](gruntjs/grunt@v1.3.0...v1.5.3)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -32,7 +32,7 @@
     "catharsis": "^0.8.9",
     "codecov": "^3.6.5",
     "eslint": "^4.8.0",
-    "grunt": "~1.3.0",
+    "grunt": "~1.5.3",
     "grunt-cli": "^1.2.0",
     "grunt-contrib-clean": "^1.1.0",
     "grunt-contrib-concat": "^1.0.1",