Add pyenv install for Python 3.7 on macOS
MODIFY
_travis/install.sh
_travis/install.sh
@@ -41,6 +41,9 @@ if [[ "$(uname -s)" == 'Darwin' ]]; then
pyenv install 3.6.3
pyenv global 3.6.3
;;
+ py37)
+ pyenv install 3.7-dev
+ pyenv global 3.7-dev
pypy*)
pyenv install "pypy-5.4.1"
pyenv global "pypy-5.4.1"

Add pyenv install for Python 3.7 on macOS