Bump grunt from 1.4.1 to 1.5.3

Bumps [grunt](https://github.com/gruntjs/grunt) from 1.4.1 to 1.5.3.
- [Release notes](https://github.com/gruntjs/grunt/releases)
- [Changelog](https://github.com/gruntjs/grunt/blob/main/CHANGELOG)
- [Commits](gruntjs/grunt@v1.4.1...v1.5.3)

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

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

package.json

@@ -12,7 +12,7 @@
     "chai-webdriver": "1.2.3",
     "chromedriver": "latest",
     "geckodriver": "3.0.1",
-    "grunt": "1.4.1",
+    "grunt": "1.5.3",
     "grunt-bower-task": "0.6.1",
     "grunt-config": "1.1.0",
     "grunt-contrib-clean": "2.0.0",