Add CircleCI config

.circleci/config.yml

@@ -0,0 +1,39 @@
+version: 2
+jobs:
+  build:
+    docker:
+      - image: circleci/node:4.8.2
+    steps:
+      - checkout
+      - run:
+          name: Update NPM
+          command: 'sudo npm install -g npm@latest'
+      - restore_cache:
+          key: dependency-cache-{{ checksum "package.json" }}
+      - run:
+          name: NPM Install
+          command: npm install
+      - save_cache:
+          key: dependency-cache-{{ checksum "package.json" }}
+          paths:
+            - node_modules
+
+  test:
+    docker:
+      - image: circleci/node:4.8.2
+    steps:
+      - checkout
+      - restore_cache:
+          key: dependency-cache-{{ checksum "package.json" }}
+      - run:
+          name: Test
+          command: npm test
+
+workflows:
+  version: 2
+  build_and_test:
+    jobs:
+      - build
+      - test:
+          requires:
+            - build

package.json

@@ -25,7 +25,10 @@
     "filter",
     "selector"
   ],
-  "author": "Tom Shawver <tom@frosteddesign.com>",
+  "authors": [
+    "Tom Shawver <tom@frosteddesign.com>",
+    "Michael Cooper <mcooper@mozilla.com>"
+  ],
   "license": "MIT",
   "bugs": {
     "url": "https://github.com/mozilla/mozjexl/issues"