Downgrade poetry to 1.0.2

Author: dgarros

.travis.yml

@@ -22,8 +22,8 @@ services:
 # --------------------------------------------------------------------------
 before_script:
 - pip install invoke docker-compose
-- curl -fsS -o get-poetry.py https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py
-- python get-poetry.py --preview -y
+- curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py > /tmp/get-poetry.py
+- python /tmp/get-poetry.py -y --version 1.0.2
 - source $HOME/.poetry/env
 
 script: