v0.39.0

Changelog

f954d4f Add failed requests information to details
3145753 Merge branch 'master' into report-details-fix
b9b7ebb Merge pull request #109 from criteo-forks/report-details-fix
b5753d6 Test which reproduce the problem
6c42470 minor code style improvement to set error string in reporter inside just one error check block