Bump grunt from 0.4.5 to 1.3.0 in /app/static/minder

Bumps [grunt](https://github.com/gruntjs/grunt) from 0.4.5 to 1.3.0.
- [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...v1.3.0)

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

app/static/minder/package.json

@@ -29,7 +29,7 @@
   "homepage": "https://github.com/fex-team/kityminder-editor",
   "devDependencies": {
     "cz-conventional-changelog": "^1.1.5",
-    "grunt": "~0.4.1",
+    "grunt": "~1.3.0",
     "grunt-angular-templates": "~0.5.0",
     "grunt-browser-sync": "^2.2.0",
     "grunt-contrib-clean": "^0.5.0",