Upgrade zlib.

[csasarak]

Overview

upgrade zlib.

Checklist

• I added tests for this PR's change (or explained in the PR description why tests don't make sense).
• If this PR introduced a user-visible change, I added documentation into docs/.
• If this PR added docs, I added links as appropriate to the user manual's ToC in docs/README.ms and gave consideration to how discoverable or not my documentation is.
• If this change is externally visible, I updated Changelog.md. If this PR did not mark a release, I added my changes into an # Unreleased section at the top.
• If I made changes to .fossa.yml or fossa-deps.{json.yml}, I updated docs/references/files/*.schema.json AND I have updated example files used by fossa init command. You may also need to update these if you have added/removed new dependency type (e.g. pip) or analysis target type (e.g. poetry).
• If I made changes to a subcommand's options, I updated docs/references/subcommands/<subcommand>.md.

[spatten]

Looks good and safe to me!

Any reason we're seeing the warnings for the use of head in this PR even though we haven't changed that code? I don't think I've seen those before

[csasarak]

They're new as of the GHC upgrade. GHC itself added some warnings for usages of those functions (in addition to hlint) with the reasoning that the compiler discouraging usage of partial functions is easier for new users of GHC. I write a little bit about it in #1460. I had trouble configuring it so that the warning would be suppressed entirely short of putting pragmas in every place they're used.