Merge pull request #32 from coinbase/coinbase/oa-coinbase-patch-2

[chore] set engines and minimum node version, with circleci

.circleci/config.yml

@@ -3,7 +3,7 @@ jobs: # a collection of steps
   build: # runs not using Workflows must have a `build` job as entry point
     working_directory: ~/ci # directory where steps will run
     docker: # run the steps with Docker
-      - image: circleci/node:6 # ...with this image as the primary container; this is where all `steps` will run
+      - image: circleci/node:8 # ...with this image as the primary container; this is where all `steps` will run
     steps: # a collection of executable commands
       - checkout # special step to check out source code to working directory
       - restore_cache: # special step to restore the dependency cache

package.json

@@ -9,6 +9,10 @@
     "commerce",
     "payments"
   ],
+  "engines": {
+    "node": ">=8.17.0",
+    "npm": ">=5.6.0"
+  },
   "homepage": "https://github.com/coinbase/coinbase-commerce-node",
   "repository": {
     "type": "git",