add circleci

Author: fxnoob

.circleci/config.yml

@@ -0,0 +1,28 @@
+version: 2
+jobs:
+  build:
+    docker:
+      - image: circleci/node:10.9.0-browsers
+
+    working_directory: ~/repo
+
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - v1-dependencies-{{ checksum "package.json" }}
+
+            # fall back to using the latest cache if no exact match is found
+            - v1-dependencies-
+
+      # Install your dependencies
+      - run: yarn install
+
+      - save_cache:
+          paths:
+            - node_modules
+          key: v1-dependencies-{{ checksum "package.json" }}
+
+      # build the extension if required
+      # Run our test suite
+      - run: yarn test