Merge branch 'roundtripper' into 'master'

fix: avoid modifying the original http.Request in RoundTripper

See merge request !233



Merged-by: Steve Xuereb <sxuereb@gitlab.com>
Approved-by: Steve Xuereb <sxuereb@gitlab.com>
Co-authored-by: Denis Peshkov <denpeshkov98@gmail.com>