Merge branch 'feature/ci' into 'master'

Add basic ci pipeline

See merge request shakemap/shakyground2!2

.gitlab-ci.yml

+image: python:3-buster
+
+before_script:
+  - python3 -V
+  - pip3 install pytest-cov
+  - pip3 install .[tests]
+  - pip3 install .
+
+formatting:
+  script:
+    - make check
+
+test:
+  script:
+    - pytest tests
+
+coverage:
+  script:
+    - pytest --cov=shakyground2/ tests/
+    - coverage xml
+  artifacts:
+    reports:
+      cobertura: coverage.xml

setup.py

@@ -2,7 +2,7 @@
 
 from setuptools import setup, find_packages
 
-test_requirements = ["pylint", "flake8", "pytest"]
+test_requirements = ["pylint", "flake8", "black", "pytest"]
 
 setup(
     name="shakyground2",