Fix MISSING replacement in log with verbose >= 5

[sayboras]

Description

Fixes #836

PR krisnova/logger#4 is raised in upstream repo. Currently, I am using my forked repo for testing purpose.

Testing

Before the changes:

$ ./eksctl create cluster --managed --node-private-networking --verbose 5 > create_cluster_fixed.lo
$ grep -is MISSING create_cluster.log | wc -l           
54

After the changes:

$ ./eksctl create cluster --managed --node-private-networking --verbose 5 > create_cluster_fixed.log
$ grep -is MISSING create_cluster_fixed.log | wc -l
0

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the userdocs directory)
• Manually tested
• Added labels for change area (e.g. area/nodegroup), target version (e.g. version/0.12.0) and kind (e.g. kind/improvement)
• Make sure the title of the PR is a good description that can go into the release notes

[martina-if]

I asked the maintainer for a review... let's see if we can get that merged.

[michaelbeaumont]

@sayboras thanks for the contribution!
given that kris-nova/logger doesn't seem to be maintained, we've decided we'd prefer a more common, better maintained library rather than forking the current logger.