FEAT(CI): +Python3.8

Author: ankostis

.travis.yml

@@ -1,32 +1,33 @@
 language: python
 python:
-- '3.6'
-- '3.7'
+  - "3.6"
+  - "3.7"
+  - "3.8"
 addons:
   apt:
     packages:
-    - graphviz
+      - graphviz
 install:
-- pip install Sphinx codecov packaging
-- 'python -c $''import os, packaging.version as version\nv = version.parse(os.environ.get("TRAVIS_TAG",
-  "1.0")).public\nwith open("VERSION", "w") as f: f.write(v)'''
-- pip install -e .[test]
-- cd docs
-- make clean html
-- cd ..
+  - pip install Sphinx codecov packaging
+  - 'python -c $''import os, packaging.version as version\nv = version.parse(os.environ.get("TRAVIS_TAG",
+    "1.0")).public\nwith open("VERSION", "w") as f: f.write(v)'''
+  - pip install -e .[test]
+  - cd docs
+  - make clean html
+  - cd ..
 script:
-# OVERRIDE pytest-defaults adopted in `setup.cfg`:
-#
-# Run doctests in latest Python; certainly not < PY3.6 due to unstable dicts.
-# Also give `-m 'slow or not slow'` since `not slow` adopted in `setup.cfg`.
-- |
-  if [[ "$TRAVIS_PYTHON_VERSION" = '3.7' ]]; then
-    pytest --cov=graphtik -m 'slow or not slow' --log-level=DEBUG
-  else
-    # Undo configs in setup.cfg
-    echo -e '[pytest]\nmarkers: slow' > pytest.ini
-    pytest  --log-level=DEBUG --cov=graphtik
-  fi
+  # OVERRIDE pytest-defaults adopted in `setup.cfg`:
+  #
+  # Run doctests in latest Python; certainly not < PY3.6 due to unstable dicts.
+  # Also give `-m 'slow or not slow'` since `not slow` adopted in `setup.cfg`.
+  - |
+    if [[ "$TRAVIS_PYTHON_VERSION" = '3.7' ]]; then
+      pytest --cov=graphtik -m 'slow or not slow' --log-level=DEBUG
+    else
+      # Undo configs in setup.cfg
+      echo -e '[pytest]\nmarkers: slow' > pytest.ini
+      pytest  --log-level=DEBUG --cov=graphtik
+    fi
 deploy:
   provider: pypi
   user: __token__
@@ -40,4 +41,4 @@ deploy:
     tags: true
     python: 3.7
 after_success:
-- codecov
+  - codecov