ci: Travis: add pypy3 to allowed failures temporarily (#5340)
ci: Travis: add pypy3 to allowed failures temporarily (#5340)

ci: Travis: add pypy3 to allowed failures temporarily
Akasurde/pytest,The-Compiler/pytest,tomviner/pytest,markshao/pytest,RonnyPfannschmidt/pytest,nicoddemus/pytest,tomviner/pytest,pytest-dev/pytest,The-Compiler/pytest,alfredodeza/pytest,nicoddemus/pytest