Fix unwarranted throwing of exception(s) to consumer during racy pool…

… creation

Update CHANGELOG

Fix bad specification of returned error reasons on :request/{4,5,6,9}

Prepare change log for 3.0.3 release

Update CHANGELOG

Merge pull request miniclip#5 from g-andrade/fix/rebar2-support

Fix rebar2 support

Merge pull request miniclip#4 from g-andrade/fix/insecure_https_conne…

…ctions

Make HTTPS connections secure by default

Merge pull request miniclip#3 from paulo-ferraz-oliveira/fix/otp_21_c…

…ompile_time_warnings

Handle OTP 21 compile-time warnings

Merge pull request miniclip#2 from MiniclipPortugal/feature/less_verbose

Move to a less verbose log