Log to stderr in forking mode

Changelog for 0.9.12:

• PR #154 Log stderr forking mode by @alexellis

Commits
5d4cadc Inline if statements and update README order by @alexellis
a5324bf Stream stderr to logs for streaming fork mode by @alexellis
ea3bcc4 Update Copyright by @alexellis
77e0a2e Update client_golang for Prometheus and build with Go 1.20 by @alexellis
5fa4988 Update README.md by @alexellis

Changes: 0.9.11...0.9.12

Generated by Derek