Adding Go 1.21.x for CI coverage #132

	name: Documentation Tests

	on:
	push:
	branches: [master, examples]
	pull_request:
	branches: [master, examples]

	permissions:
	contents: read

	jobs:
	doctests:
	name: doctests
	runs-on: ubuntu-latest

	services:
	redis-stack:
	image: redis/redis-stack-server:latest
	options: >-
	--health-cmd "redis-cli ping" --health-interval 10s --health-timeout 5s --health-retries 5
	ports:
	- 6379:6379

	strategy:
	fail-fast: false
	matrix:
	go-version: [ "1.18", "1.19", "1.20" ]

	steps:
	- name: Set up ${{ matrix.go-version }}
	uses: actions/setup-go@v4
	with:
	go-version: ${{ matrix.go-version }}

	- name: Checkout code
	uses: actions/checkout@v3

	- name: Test doc examples
	working-directory: ./doctests
	run: go test

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