Update dependency @11ty/eleventy to v3

Author: renovate[bot]

package.json

@@ -20,7 +20,7 @@
   },
   "homepage": "https://niels.ment.ink",
   "dependencies": {
-    "@11ty/eleventy": "^0.10.0",
+    "@11ty/eleventy": "^3.0.0",
     "del": "^5.1.0",
     "feather-icons": "^4.25.0",
     "gulp": "^4.0.2",