CI: Add circleci script

Author: erodewald

.circleci/config.yml

@@ -0,0 +1,75 @@
+version: 2.1
+
+orbs:
+  codecov: codecov/codecov@1.0.4
+  build-helpers: style/build-helpers@1.3.1
+
+references:
+  attach_workspace: &attach_workspace
+    attach_workspace:
+      at: ~/repo
+  persist_to_workspace: &persist_to_workspace
+    persist_to_workspace:
+      root: ~/repo
+      paths: .
+
+executors:
+  albus:
+    docker:
+      - image: circleci/node:10.15.1
+    working_directory: ~/repo
+
+jobs:
+  install_dependencies:
+    executor: albus
+    steps:
+      - *attach_workspace
+      - checkout
+      - restore_cache:
+          keys:
+            - v1-dependencies-{{ checksum "package.json" }}
+            # fallback to using the latest cache if no exact match is found
+            - v1-dependencies-
+      - run: npm install
+      - save_cache:
+          paths:
+            - node_modules
+          key: v1-dependencies-{{ checksum "package.json" }}
+      - *persist_to_workspace
+  test:
+    executor: albus
+    steps:
+      - *attach_workspace
+      - run: npm test
+      - codecov/upload:
+          file: .nyc_output/*.json
+      - *persist_to_workspace
+  publish:
+    executor: albus
+    steps:
+      - *attach_workspace
+      - checkout
+      - run: npx semantic-release
+
+workflows:
+  build:
+    jobs:
+      - install_dependencies:
+          context: pi
+          filters:
+              branches:
+                  only: /.*/
+      - test:
+          context: pi
+          requires:
+              - install_dependencies
+          filters:
+              branches:
+                only: /.*/
+      - publish:
+            context: pi
+            requires:
+              - test
+            filters:
+              branches:
+                only: master