Merge pull request #11095 from openlayers/dependabot/npm_and_yarn/front-matter-4.0.0

Bump front-matter from 3.2.1 to 4.0.0

package.json

@@ -66,7 +66,7 @@
     "eslint": "^6.8.0",
     "eslint-config-openlayers": "^14.0.0",
     "expect.js": "0.3.1",
-    "front-matter": "^3.0.2",
+    "front-matter": "^4.0.0",
     "fs-extra": "^9.0.0",
     "glob": "^7.1.5",
     "globby": "^11.0.0",