Update packages to their latest versions and improve test

[ghimire]

In this PR:

• Update go packages to their latest versions
• Run go mod tiny
• Add missing EOL
• Improve tests:
  • To ensure k3d is running
  • To ensure kubeconfig is available

[joe-elliott]

What does go.mod look like if you run go mod tidy ? I think most of those deps would disappear.

Is there a particular reason to update the dependencies? Is there a bug fix or feature you're trying to capture?

[ghimire]

@joe-elliott I have updated this PR with the result of go mod tidy after your suggestion. In some cases while building the docker image after running go build on host, the build was failing. On clean cloned repository this wasn't the case. So I can't say there are any particular reasons to update the dependencies other than the usual benefits of having latest code.

I have since updated the test to ensure k3d is running and kubeconfig are available before kubernetes-diff-logger binary is run. On several occasions, either of those conditions failed before the executable was run and it would fail. This is no longer happening with these improvements.

[joe-elliott]

LGTM. Thanks for the contribution!