Update to go1.21 and golangci 1.60.0, test with go1.23 (#104) #227

	name: ci
	on: push
	permissions:
	contents: read
	jobs:
	ci:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	go-version: [1.21.x, 1.22.x, 1.23.x]
	steps:
	- name: checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- name: setup-go
	uses: actions/setup-go@v5
	with:
	go-version: ${{ matrix.go-version }}
	- name: setup-buf
	uses: bufbuild/buf-setup-action@v1
	- name: cache
	uses: actions/cache@v4
	with:
	path: ~/go/pkg/mod
	key: ${{ runner.os }}-connect-ci-${{ hashFiles('**/go.sum') }}
	restore-keys: ${{ runner.os }}-connect-ci-
	- name: generate
	run: make generate && make checkgenerate
	- name: test
	env:
	BUF_TOKEN: ${{ secrets.BUF_TOKEN }}
	run: make test
	- name: lint
	if: matrix.go-version == '1.23.x'
	run: make lint

Provide feedback