After SafeEventEmitterProvider is updated to support EIP-1193 and a new version of @metamask/eth-json-rpc-provider is released, we should adapt to the changes:

• We should bump @metamask/eth-json-rpc-provider to rely on the new changes.
• At that point, calling sendAsync will be deprecated; we should use request instead.
  • There are two middleware which use sendAsync: retryOnEmpty and block-ref.
  • We also use sendAsync in providerAsMiddleware.
  • Finally, there are a lot of tests that mock sendAsync on the provider. The tests use a helper, stubProviderRequests which does this in particular. These references need to be changed.