Merge pull request 'Add Drone config' (#2) from add-drone-ci-config into master

Reviewed-on: #2

.drone.yml

@@ -0,0 +1,10 @@
+kind: pipeline
+name: default
+
+steps:
+- name: test
+  image: python:3
+  commands:
+  - pip install -e .
+  - pip install pytest
+  - pytest