Add CircleCI config

Author: gahjelle

.circleci/config.yml

@@ -0,0 +1,41 @@
+version: 2
+
+shared: &shared
+    working_directory: ~/circleci-codetiming
+    steps:
+      - checkout
+      - run:
+          name: Install
+          command: |
+            python -m pip install flit --user
+            python -m flit install --deps=develop
+      - run:
+          name: Test
+          command: |
+            python -m tox --recreate
+
+jobs:
+  "test-py36":
+    <<: *shared
+    docker:
+      - image: circleci/python:3.6
+
+  "test-py37":
+    <<: *shared
+    docker:
+      - image: circleci/python:3.7
+
+  "test-py38":
+    <<: *shared
+    docker:
+      - image: circleci/python:3.8-rc
+
+
+workflows:
+  version: 2
+
+  development-workflow:
+    jobs:
+      - "test-py36"
+      - "test-py37"
+      - "test-py38"