Update golangci-lint image to Go 1.14 to eliminate unnecessary warnings
## Summary This image: registry.gitlab.com/gitlab-org/gitlab-build-images:golangci-lint-alpine This is recommended as the way to perform linting of Go projects in the Gitlab CI documentation, here: https://docs.gitlab.com/ee/development/go_guide/#automatic-linting The problem is that the image is based on a Go version that does not include `*testing.T Cleanup()` (Go 1.13?) It should be updated to Go 1.14 to support current developer workflow. Projects using `*testing.T Cleanup()` will have warnings generated during linting. ## Improvements Update the Go version in the image to Go 1.14 Optionally, provide multiple versions of the image with current releases of Go. ## Risks This seems pretty low risk given that all it is used for is linting code ## Involved components I think the image is the only component
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