add contract networks

Author: sinzii

packages/typink/src/networks/development.ts

@@ -5,7 +5,6 @@ export const development: NetworkInfo = {
   name: 'Development',
   logo: `https://avatars.githubusercontent.com/u/47530779?s=200&v=4`,
   provider: 'ws://127.0.0.1:9944',
-  prefix: 42,
   symbol: 'UNIT',
   decimals: 12,
 };