Upgrade CircleCI Node version to fix compatibility with new jsdom version

Author: ryanhefner

.circleci/config.yml

@@ -7,7 +7,7 @@ jobs:
   build:
     docker:
       # specify the version you desire here
-      - image: circleci/node:7.10
+      - image: circleci/node:8.0.0
 
       # Specify service dependencies here if necessary
       # CircleCI maintains a library of pre-built images