fix:travis yml script updated
This commit fixes a build fail in Travis-Ci which is due to the old
version of pytest. New travis yml script updates the old version of
requirments for tests and then builds.
@@ -26,9 +26,7 @@ before_install:
- python3 --version
- pip3 install --upgrade pip
- pip3 install -r requirements.txt
- # - pip3 install -r tests/requirements.txt
- pip3 install -U -r tests/requirements.txt
- # - pip3 install -U pytest
- pip3 install -r optional-requirements.txt
# command to run tests
