Bump grunt from 1.4.1 to 1.5.0

Bumps [grunt](https://github.com/gruntjs/grunt) from 1.4.1 to 1.5.0.
- [Release notes](https://github.com/gruntjs/grunt/releases)
- [Changelog](https://github.com/gruntjs/grunt/blob/main/CHANGELOG)
- [Commits](gruntjs/grunt@v1.4.1...v1.5.0)

---
updated-dependencies:
- dependency-name: grunt
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -47,7 +47,7 @@
   },
   "homepage": "https://github.com/pfefferle/SemPress",
   "devDependencies": {
-    "grunt": "~1.4.1",
+    "grunt": "~1.5.0",
     "grunt-contrib-watch": "^1.1.0",
     "grunt-replace": "~2.0.2",
     "grunt-sass": "^3.1.0",