add workflow_dispatch to build #4

	name: Build

	on:
	push:
	branches: [ mainline ]
	pull_request:
	branches: [ mainline ]
	workflow_dispatch:

	jobs:

	build:
	name: Build
	runs-on: ubuntu-latest
	steps:

	- name: Set up Go 1.19
	uses: actions/setup-go@v2
	with:
	go-version: 1.19
	id: go

	- name: Install cross-compiler for Windows
	run: sudo apt-get install -y gcc-multilib gcc-mingw-w64

	- name: Check out code into the Go module directory
	uses: actions/checkout@v2

	- name: golint
	run: go install golang.org/x/lint/golint@latest

	- name: Build
	run: make build windows-release test

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