Bump grunt from 1.4.1 to 1.5.2 (#111)

Bumps [grunt](https://github.com/gruntjs/grunt) from 1.4.1 to 1.5.2.
- [Release notes](https://github.com/gruntjs/grunt/releases)
- [Changelog](https://github.com/gruntjs/grunt/blob/main/CHANGELOG)
- [Commits](gruntjs/grunt@v1.4.1...v1.5.2)

---
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>

package.json

@@ -30,7 +30,7 @@
   },
   "devDependencies": {
     "eslint-config-wikimedia": "0.22.1",
-    "grunt": "1.4.1",
+    "grunt": "1.5.2",
     "grunt-contrib-clean": "2.0.0",
     "grunt-contrib-nodeunit": "4.0.0",
     "grunt-eslint": "24.0.0",