fix: update circleci config

Author: foryuki

.circleci/config.yml

@@ -1,24 +1,32 @@
 version: 2
 jobs:
   build:
-    working_directory: ~/project
     docker:
       - image: circleci/node:latest
+
     branches:
-      ignore:
-        - gh-pages # list of branches to ignore
-        - /release\/.*/ # or ignore regexes
+      only:
+        - master
+        - /^greenkeeper/.*$/
+
+    working_directory: ~/repo
+
     steps:
       - checkout
+
+      # Download and cache dependencies
       - restore_cache:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
-      - run:
-          name: install dependences
-          command: npm install
+          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:
-          key: dependency-cache-{{ checksum "package-lock.json" }}
           paths:
-            - ./node_modules
-      - run:
-          name: test
-          command: npm run test
+            - node_modules
+          key: v1-dependencies-{{ checksum "package.json" }}
+
+      # run tests!
+      - run: npm run test