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](https://github.com/gruntjs/grunt/compare/v1.4.1...v1.5.3)

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

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

package.json

@@ -71,7 +71,7 @@
         "@types/request": "^2.48.8",
         "bower": "^1.8.13",
         "escape-string-regexp": "^5.0.0",
-        "grunt": "^1.4.1",
+        "grunt": "^1.5.3",
         "grunt-autoprefixer": "^3.0.4",
         "grunt-cli": "^1.4.3",
         "grunt-concurrent": "^3.0.0",