upgrade to circleci 2.0

.circleci/config.yml

@@ -1,6 +1,26 @@
-machine:
-  node:
-    version: 8.11.3
-dependencies:
-  pre:
-    - "npm i -g mocha"
+# Javascript Node CircleCI 2.0 configuration file
+#
+# Check https://circleci.com/docs/2.0/language-javascript/ for more details
+#
+version: 2
+jobs:
+  build:
+    docker:
+      # specify the version you desire here
+      - image: circleci/node:8.11.3
+
+      # Specify service dependencies here if necessary
+      # CircleCI maintains a library of pre-built images
+      # documented at https://circleci.com/docs/2.0/circleci-images/
+      # - image: circleci/mongo:3.4.4
+
+    working_directory: ~/repo
+
+    steps:
+      - checkout
+
+      # install dependencies
+      - run: npm install
+
+      # run tests
+      - run: npm run test