Bump grunt from 1.5.2 to 1.5.3

Bumps [grunt](https://github.com/gruntjs/grunt) from 1.5.2 to 1.5.3.
- [Release notes](https://github.com/gruntjs/grunt/releases)
- [Changelog](https://github.com/gruntjs/grunt/blob/main/CHANGELOG)
- [Commits](gruntjs/grunt@v1.5.2...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 @@
 {
   "name": "wapuuvatar",
   "devDependencies": {
-    "grunt": "^1.5.2"
+    "grunt": "^1.5.3"
   },
   "dependencies": {
     "grunt-responsive-images": "^1.10.1"