Bump grunt-shell from 2.1.0 to 3.0.1 (RobotWebTools#371)

Bumps [grunt-shell](https://github.com/sindresorhus/grunt-shell) from 2.1.0 to 3.0.1.
- [Release notes](https://github.com/sindresorhus/grunt-shell/releases)
- [Commits](sindresorhus/grunt-shell@v2.1.0...v3.0.1)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -21,7 +21,7 @@
     "grunt-jsdoc": "^2.1.0",
     "grunt-karma": "^2.0.0",
     "grunt-pipe": "git+https://github.com/gruntjs-updater/grunt-pipe.git#peerDep",
-    "grunt-shell": "^2.1.0",
+    "grunt-shell": "^3.0.1",
     "gruntify-eslint": "^4.0.0",
     "karma": "^6.3.2",
     "karma-chai": "^0.1.0",