Remove peerDependencies to avoid warnings

It's not great, but we weren't going to be using them to limit version compat anyway.
Fixes #94.

Author: developit

package.json

@@ -78,9 +78,5 @@
     "microbundle": "^0.10.1",
     "preact": "^8.4.2",
     "react": "^16.8.3"
-  },
-  "dependencies": {},
-  "peerDependencies": {
-    "preact": "*"
   }
 }