Revert "Merge pull request #1205 from processing/dependabot/npm_and_yarn/grunt-1.5.3"

This reverts commit fc4fcf4, reversing
changes made to c225007.

Author: Lucie-Brosson

package-lock.json

@@ -52,7 +52,7 @@
     "flat": "^5.0.2",
     "fs-extra": "^9.1.0",
     "glob": "^5.0.15",
-    "grunt": "^1.5.3",
+    "grunt": "^1.4.1",
     "grunt-assemble": "^0.6.3",
     "grunt-cli": "^1.4.3",
     "grunt-contrib-clean": "^0.6.0",