Trying to fix Travis

.travis.yml

@@ -8,7 +8,7 @@ python:
 before_install:
 - pip install "pytest>=3.6"
 - pip install pytest-cov
-- pip install "importlib-metadata>=6" # Fixes build issue with coveralls
+- pip install "importlib-metadata<5" # Fixes build issue with coveralls
 - pip install coveralls
 script:
 - pytest