Simplify CI config

.circleci/config.yml

@@ -1,39 +1,11 @@
-version: 2
+version: 3
 jobs:
   build:
     docker:
-      - image: reactcommunity/node-ci:8.4.0-0 # custom image -- includes ocaml, libelf1, Yarn
+      - image: circleci/node:10
     parallelism: 2
     working_directory: ~/react-navigation
     steps:
       - checkout
-      - restore_cache:
-          # cache by branch + package.json, by branch, and then master
-          keys: 
-            - v3-react-navigation-{{ .Branch }}-{{ checksum "package.json" }}
-            - v3-react-navigation-{{ .Branch }}
-            - v3-react-navigation-master
-      - run: yarn # install root deps
-      - run: ./scripts/test.sh # run tests
-      - setup_remote_docker
-      # - deploy:
-      #    command: |
-      #      set -x
-      #        VER="17.03.0-ce"
-      #       curl -L -o /tmp/docker-$VER.tgz https://get.docker.com/builds/Linux/x86_64/docker-$VER.tgz
-      #       tar -xz -C /tmp -f /tmp/docker-$VER.tgz
-      #       mv /tmp/docker/* /usr/bin
-      #
-            # yarn global add exp
-            # set +x
-            # exp login -u "$EXPO_USERNAME" -p "$EXPO_PASSWORD"
-            # set -x
-            # cd examples/NavigationPlayground && yarn && exp publish --release-channel "${CIRCLE_SHA1}"
-      - save_cache:
-          key: v3-react-navigation-{{ .Branch }}-{{ checksum "package.json" }}
-          paths:
-            - ~/.cache/yarn
-            # - ~/react-navigation/examples/NavigationPlayground/node_modules
-# notify:
-#  webhooks:
-#    - url: https://react-navigation-ci.now.sh
+      - run: yarn install --frozen-lockfile
+      - run: ./scripts/test.sh