fix(package): update preact to version 10.3.3

Closes #31

Author: greenkeeper[bot]

package.json

@@ -28,7 +28,7 @@
   },
   "dependencies": {
     "critters-webpack-plugin": "^2.1.1",
-    "preact": "^8.4.2",
+    "preact": "^10.3.3",
     "preact-compat": "^3.18.4",
     "serve": "^10.1.1"
   }