ci: fix lint, fmt and upload artifacts (#218)

* chore(.github): update actions/upload-artifacts

.github/workflows/ci.yml

@@ -32,7 +32,7 @@ jobs:
         env:
           COVERALLS_TOKEN: ${{ secrets.github_token }}
       - name: Upload coverage.html
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: coverage
           path: ci/out/coverage.html

ci/fmt.mk

@@ -13,7 +13,8 @@ modtidy: gen
 	go mod tidy
 
 gofmt: gen
-	go run mvdan.cc/gofumpt@latest -w .
+	# gofumpt v0.7.0 requires Go 1.22 or later.
+	go run mvdan.cc/[email protected] -w .
 
 prettier:
 	npx prettier --write --print-width=120 --no-semi --trailing-comma=all --loglevel=warn $$(git ls-files "*.yml")

ci/lint.mk

@@ -4,4 +4,5 @@ govet:
 	go vet ./...
 
 golint:
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint@latest run .
+	# golangci-lint newer than v1.55.2 is not compatible with Go 1.20 when using go run.
+	go run github.com/golangci/golangci-lint/cmd/[email protected] run .