Moves test helpers to separate file #163

	name: Deriv API

	on: [push]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	go-version: ["1.20.x", "1.21.x", "1.22.x"]

	steps:
	- uses: actions/checkout@v3
	- name: Setup Go ${{ matrix.go-version }}
	uses: actions/setup-go@v3
	with:
	go-version: ${{ matrix.go-version }}

	- name: Display Go version
	run: go version

	- name: Build
	run: go build -v .
	- name: Test
	run: go test -coverprofile=coverage.out -covermode=atomic -v --race .
	- name: Prepare coverage reports
	run: \|
	cat coverage.out \| grep -v "/schema.go" \| grep -v "/calls.go" \| grep -v "/custom_subscription_calls.go" \| grep -v "subscription_calls.go" > coverage.final.out
	mv coverage.final.out coverage.out
	- name: Upload coverage reports to Codecov
	uses: codecov/codecov-action@v3

Provide feedback