Rewrite XrplClient.request and general cleanup (#1519)

* first attempt at overloading

* fix TS issues

* improve connection typing

* more cleanup

* edit all ledger files

* more renames

* fix all other request calls

* clean up serverinfo

* fixes more request calls

* remove old legacy browser stuff

* remove unused types

* remove exports from objects

* add type to method signatures

* add ledger requests

* fix most tests

* comment out formatBidsAndAsks

* fix proxy test

* comment out failing tests

* move client-related files into client

* add payment channel requests

* fix imports

* remove finished TODOs

* fix tests

* fix integ tests

* remove exported types

* better ci

test/utils.ts

@@ -4,7 +4,6 @@ import fs from 'fs'
 import path from 'path'
 import {Client} from 'xrpl-local'
 import assert from 'assert-diff'
-const {schemaValidator} = Client._PRIVATE
 
 /**
  * The test function. It takes a Client object and then some other data to
@@ -67,9 +66,6 @@ export function assertResultMatch(
     _.omit(response, ['txJSON', 'tx_json']),
     _.omit(expected, ['txJSON', 'tx_json'])
   )
-  if (schemaName) {
-    schemaValidator.schemaValidate(schemaName, response)
-  }
 }
 
 /**