Bump grunt from 0.4.5 to 1.5.2

Bumps [grunt](https://github.com/gruntjs/grunt) from 0.4.5 to 1.5.2.
- [Release notes](https://github.com/gruntjs/grunt/releases)
- [Changelog](https://github.com/gruntjs/grunt/blob/main/CHANGELOG)
- [Commits](https://github.com/gruntjs/grunt/compare/v0.4.5...v1.5.2

)

---
updated-dependencies:
- dependency-name: grunt
  dependency-type: direct:development
...
Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -19,7 +19,7 @@
   "devDependencies": {
     "autoprefixer": "^6.1.2",
     "connect-modrewrite": "^0.10.2",
-    "grunt": "^0.4.5",
+    "grunt": "^1.5.2",
     "grunt-angular-templates": "^0.5.7",
     "grunt-cli": "^1.3.2",
     "grunt-concurrent": "^1.0.0",