ci: Travis: run py37-lsof-numpy-xdist with coverage
ci: Travis: run py37-lsof-numpy-xdist with coverage

pytest-dev/pytest,alfredodeza/pytest,nicoddemus/pytest,The-Compiler/pytest,RonnyPfannschmidt/pytest,nicoddemus/pytest,tomviner/pytest,markshao/pytest,The-Compiler/pytest,tomviner/pytest,Akasurde/pytest