Run yarn dedupe to fix issue with @polkadot/keyring (#337)

* Run `yarn dedupe`

This fixes the problem with the `@polkadot/keyring` package, which
necessitated an `unknown` type cast on dev account objects.

* Remove `as unknown` type cast on dev account objects

Author: rockbmb

packages/networks/src/defaultAccounts.ts

@@ -4,6 +4,12 @@ import type { KeyringInstance, KeyringPair } from '@polkadot/keyring/types'
 
 import { cryptoWaitReady } from '@polkadot/util-crypto'
 
+/**
+ * Type of object containing dev accounts that are used in tests.
+ *
+ * The keyrings are used to create fresh accounts: in some networks (e.g. testnets), dev accounts may have
+ * already been used, and can thus alter the result of testing.
+ */
 export type DefaultAccounts = {
   alice: KeyringPair
   bob: KeyringPair
@@ -19,7 +25,7 @@ export type DefaultAccounts = {
   keyringEth: KeyringInstance
 }
 
-export const defaultAccounts: DefaultAccounts = testingPairs() as unknown as DefaultAccounts
+export const defaultAccounts: DefaultAccounts = testingPairs() as DefaultAccounts
 
 /**
  * Sr25519 keyring pairs for use in tests.
@@ -29,4 +35,4 @@ export const defaultAccounts: DefaultAccounts = testingPairs() as unknown as Def
  */
 export const defaultAccountsSr25519: DefaultAccounts = (await cryptoWaitReady().then(() =>
   testingPairs('sr25519'),
-)) as unknown as DefaultAccounts
+)) as DefaultAccounts