chore: circle ci (#149)

.circleci/config.yml

@@ -0,0 +1,15 @@
+version: 2
+jobs:
+  build:
+    docker:
+      - image: circleci/node
+    steps:
+      - checkout
+      - run: npm install
+      - run: npm run lint
+      - run: npm run build
+workflows:
+  version: 2
+  build:
+    jobs:
+      - build

.travis.yml

@@ -1,8 +0,0 @@
-language: node_js
-
-node_js:
-  - 10.8.0
-
-script:
-  - npm run lint
-  - npm run build