Loosen faraday-gzip to a version that can use > zlib-2.1.1

[technicalpickles]

I was looking to update our app from using zlib 2.1.1 to the latest zlib-3.1.1, but bundler wasn't able to update it. I tracked down the dependency chain to:

• faraday-gzip-1.0.1 depends on zlib ~> 2.1, which resolves to zlib-2.1.1
• quickbook-ruby depends on faraday-gzip ~> 1.0 which resolves to faraday-gzip-1.0.1

This PR tries to loosen the dependency to >= 1.0. I'm open to other variations that would allow faraday-gzip-2 though.