Merge branch 'develop' into x509_symmetry

Author: jschlyter

.travis.yml

@@ -15,10 +15,10 @@ install:
   - pip install tox tox-travis
   - pip install isort black
 script:
-  - isort --check src tests
-  - black --check src tests
   - codecov --version
   - tox
+  - isort --check src tests
+  - black --check src tests
 after_success:
   - codecov
 notifications: