update circle to use orb and node 12

Author: chrisbreiding

circle.yml

@@ -1,29 +1,19 @@
-version: 2
+version: 2.1
 
-workflows:
-  version: 2
-  tests:
-    jobs:
-      - test
+orbs:
+  node: circleci/node@1.1
 
 jobs:
   test:
-    docker:
-      - image: cypress/base:8
+    executor:
+      name: node/default
+      tag: '12'
 
     steps:
       - checkout
-
-      - restore_cache:
-          keys:
-            - cache-{{ arch }}-{{ .Branch }}-{{ checksum "package.json" }}
       - run:
           name: Yarn install
           command: yarn install --frozen-lockfile
-      - save_cache:
-          key: cache-{{ arch }}-{{ .Branch }}-{{ checksum "package.json" }}
-          paths:
-            - ~/.cache
       - run:
           name: Lint code
           command: npm run lint