[Travis] manually upgrade virtualenv

to fix issues with dev version of Python 3.9
This commit is contained in:
MinchinWeb 2020-01-29 08:13:40 -07:00
parent 5033bb3e30
commit 2cda0afd89

View file

@ -11,6 +11,7 @@ git:
before_install:
- date
- pip install --upgrade virtualenv
install:
- pip install poetry~=0.12.17