[WIP] Bulk updates

[phenixblue]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:

/kind bug /kind cleanup /kind deprecation /kind design /kind documentation

/kind feature

/kind release

What this PR does / why we need it:

• Sanitize user specified regex substitution patterns (#66)
• Add K8s compatibility matrix (#62)
• Push images to ghcr.io in addition to DockerHub (#63)
• Bump CodeQL to v2 (#72)

Which issue(s) this PR fixes:

Fixes #66 Fixes #62 Fixes #63 Fixes #72

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Additional documentation e.g., usage docs, etc.:

[M4C4R]

Fixes #58