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] <support@github.com>

package.json

@@ -1,7 +1,7 @@
 {
   "description": "This package.json file is only used for installing npm dependencies. But this is not an installable node package, but a WireCloud operator. Take a look into src/config.xml for more details about this operator",
   "devDependencies": {
-    "grunt": "^1.0.4",
+    "grunt": "^1.5.3",
     "grunt-contrib-clean": "^1.1.0",
     "grunt-contrib-compress": "^1.4.3",
     "grunt-contrib-copy": "^1.0.0",