bybit websocket client integration test

There are tests so that we can get to know the changes of bybit websocket response.

Before run test, export testnet api key and secret

$ export BYBIT_TEST_KEY=xxx
$ export BYBIT_TEST_SECRET=xxx

Also be sure to prepare assets on your testnet wallet

Test with updating golden file

$ make test BYBIT_TEST_UPDATED=true

Test

$ make test

Test specific method

$ make test-spec BYBIT_TEST_METHOD=TestBalance