chore: update circle ci

Author: flotwig

.circleci/config.yml

@@ -1,18 +1,37 @@
+# Javascript Node CircleCI 2.0 configuration file
+#
+# Check https://circleci.com/docs/2.0/language-javascript/ for more details
+#
 version: 2
 jobs:
   build:
     docker:
-      - image: circleci/node
+      # specify the version you desire here
+      - image: circleci/node:7.10
+
+      # 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
+
+      # Download and cache dependencies
       - restore_cache:
-          key: dependency-cache-{{ checksum "package.json" }}
-      - run:
-          command: yarn
+          keys:
+            - v1-dependencies-{{ checksum "package.json" }}
+            # fallback to using the latest cache if no exact match is found
+            - v1-dependencies-
+
+      - run: yarn install
+
       - save_cache:
-          key: dependency-cache-{{ checksum "package.json" }}
           paths:
-            - ./node_modules
-      - run:
-          name: test
-          command: yarn run test
+            - node_modules
+          key: v1-dependencies-{{ checksum "package.json" }}
+
+      # run tests!
+      - run: yarn test

README.md

@@ -4,7 +4,7 @@
 
 [![NPM][npm-icon] ][npm-url]
 
-[![Build status][ci-image] ][ci-url]
+<!-- [![Build status][ci-image] ][ci-url] -->
 [![semantic-release][semantic-image] ][semantic-url]
 
 ## Install