EVM-437 Batch calls over websockets not working properly

[igorcrevar]

Description

There was no support for batch requests over web socket in edge

HI Team - [@Jesse Lee](https://0xpolygon.slack.com/team/U044LBPUHUG) and I observed that polycli monitor didn't work properly when connected to Edge via websocket.  It works fine on a standard HTTP transport. The root cause seems to be that websocket RPC doesn't seem to support standard JSON RPC requests that are [batched.In](http://batched.in/) the example screenshot, I'm doing 4 things:


OK .Making a batch call over websocket to Alchemy. This works fine


NOT OK. Making a batch call over websocket to v0.7.1-alpha3 Nexon. This does not work.


NOT OK. Making a batch call over websocket to v0.6.2 Necon. This does not work.


OK. Making a batch call over HTTP to v0.7.1-alpha3 Nexon. This works fineJust wanted to check and see if we're doing something wrong or if this is expected behavior?

Changes include

• Bugfix (non-breaking change that solves an issue)
• Hotfix (change that solves an urgent issue, and requires immediate attention)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)

Checklist

• I have assigned this PR to myself
• I have added at least 1 reviewer
• I have added the relevant labels
• I have updated the official documentation
• I have added sufficient documentation in code

Testing

• I have tested this code with the official test suite
• I have tested this code manually

[vcastellm]

LGTM