feat: celo mainnet (#587)

Author: yomarion

src/utilities.ts

@@ -325,6 +325,8 @@ export function networkName(id: number): string {
       return 'kovan'
     case 100:
       return 'xdai'
+    case 42220:
+      return 'celo'
     default:
       const { networkId, networkName } = get(app)
       return (networkId === id && networkName) || 'unknown'
@@ -345,6 +347,8 @@ export function networkToId(network: string): number {
       return 42
     case 'xdai':
       return 100
+    case 'celo':
+      return 42220
     default:
       return 0
   }