Fix build errors due to type-check (#1130)

* Fix build errors due to yarn type-check

Author: Adamj1232

packages/core/src/chain.ts

@@ -1,5 +1,5 @@
 import { firstValueFrom } from 'rxjs'
-import { filter, mapTo } from 'rxjs/operators'
+import { filter, map } from 'rxjs/operators'
 import { ProviderRpcErrorCode } from '@web3-onboard/common'
 import { addNewChain, switchChain } from './provider'
 import { state } from './store'
@@ -62,7 +62,7 @@ async function setChain(options: {
     const { code } = error as { code: number }
     const switchChainModalClosed$ = switchChainModal$.pipe(
       filter(x => x === null),
-      mapTo(false)
+      map(() => false)
     )
 
     if (code === ProviderRpcErrorCode.CHAIN_NOT_ADDED) {

packages/core/src/index.ts

@@ -25,7 +25,7 @@ import {
   setPrimaryWallet
 } from './store/actions'
 
-import updateBalances from './updateBalances'
+import updateBalances from './update-balances'
 
 const API = {
   connectWallet,

packages/core/src/types.ts

@@ -10,10 +10,6 @@ import type {
   TokenSymbol
 } from '@web3-onboard/common'
 
-import type setChain from './chain'
-import type connect from './connect'
-import type disconnect from './disconnect'
-import type { state } from './store'
 import type en from './i18n/en.json'
 import type { EthereumTransactionData, Network } from 'bnc-sdk'