Update POA Node URL (#1986)

* Closes #1984. Change POA.network RPC endpoint to Poa.Infura.io

* change type to infura

common/features/config/networks/static/reducer.ts

@@ -206,7 +206,7 @@ export const STATIC_NETWORKS_INITIAL_STATE: StaticNetworksState = {
     isCustom: false,
     color: '#6d2eae',
     blockExplorer: makeExplorer({
-      name: 'Etherchain Light',
+      name: 'POA Explorer',
       origin: 'https://poaexplorer.com',
       addressPath: 'address/search',
       blockPath: 'blocks/block'

common/libs/nodes/configs.ts

@@ -108,9 +108,9 @@ export const NODE_CONFIGS: { [key in StaticNetworkIds]: RawNodeConfig[] } = {
   POA: [
     {
       name: makeNodeName('POA', 'core'),
-      type: 'rpc',
-      service: 'poa.network',
-      url: 'https://core.poa.network'
+      type: 'infura',
+      service: 'poa.infura.io',
+      url: 'https://poa.infura.io'
     }
   ],