fix: instantSend 400 request error

[jojobyte]

This bug is related to implementing https://github.com/dashhive/crowdnode.js for dashhive/crowdnode.js#47 in dashhive/crowdnode-ui#1

It happens at this timestamp in my stream https://youtu.be/Hik0sLqudYg?t=3025

When executing CrowdNode.signup or CrowdNode.accept in browser, the error below is thrown. This attempts to fix the error and let you continue the CrowdNode signup and accept process.

POST https://dashsight.dashincubator.dev/insight-api/tx/sendix 400
Uncaught (in promise) TypeError: Failed to execute 'text' on 'Response': body stream already read

The problem appears to be that json: true, and form: { rawtx: hexTx, }, are not valid options for the @root/request library and do not properly set the headers for the request.

// this was attempted but did not fix the issue entirely, just changed the error.
json: {
  rawtx: hexTx,
},

[jojobyte]

Superseded by #20