fix cors

apps/remix-ide/src/blockchain/providers/vm.ts

@@ -1,5 +1,5 @@
 import Web3, { FMT_BYTES, FMT_NUMBER, LegacySendAsyncProvider } from 'web3'
-import { fromWei } from 'web3-utils'
+import { fromWei, toBigInt } from 'web3-utils'
 import { privateToAddress, hashPersonalMessage } from '@ethereumjs/util'
 import { extend, JSONRPCRequestPayload, JSONRPCResponseCallback } from '@remix-project/remix-simulator'
 import { ExecutionContext } from '../execution-context'
@@ -83,7 +83,7 @@ export class VMProvider {
 
   async getBalanceInEther (address) {
     const balance = await this.web3.eth.getBalance(address, undefined, { number: FMT_NUMBER.HEX, bytes: FMT_BYTES.HEX })
-    return fromWei(BigInt(balance).toString(10), 'ether')
+    return fromWei(toBigInt(balance).toString(10), 'ether')
   }
 
   getGasPrice (cb) {

yarn.lock

@@ -10419,6 +10419,14 @@ core-util-is@~1.0.0:
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
   integrity sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=
 
+cors@^2.8.5:
+  version "2.8.5"
+  resolved "https://registry.yarnpkg.com/cors/-/cors-2.8.5.tgz#eac11da51592dd86b9f06f6e7ac293b3df875d29"
+  integrity sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==
+  dependencies:
+    object-assign "^4"
+    vary "^1"
+
 corser@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/corser/-/corser-2.0.1.tgz#8eda252ecaab5840dcd975ceb90d9370c819ff87"