Update packer-plugin-sdk; add go.mod replace go-cty (#263) #280

	name: Unit Tests

	on:
	push:
	branches:
	- '*'
	pull_request:
	branches:
	- '*'
	jobs:

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

	- name: Set up Go 1.20
	uses: actions/setup-go@v1
	with:
	go-version: "1.20"
	id: go

	- name: Check out code into the Go module directory
	uses: actions/checkout@v2
	- name: Build
	run: make test
	env:
	VULTR_API_KEY: ${{ secrets.VULTR_API_KEY }}

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