Change .travis.yml

.travis.yml

@@ -1,26 +1,6 @@
 language: node_js
-# To fix the npm version in 4.x
-# refs: https://github.com/travis-ci/travis-ci/issues/4653#issuecomment-194051953
-before_install: 'if [[ `npm -v` != 4* ]]; then npm i -g npm@4; fi'
-matrix:
-  include:
-    - os: osx
-      install:
-        - 'if [[ ${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH} = "master" ]]; then yarn; fi'
-      node_js:
-        - 'stable'
-        - 'lts/*'
-      script:
-        - 'if [[ ${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH} = "master" && ${TRAVIS_NODE_VERSION} = "stable" ]]; then
-             npm run lint;
-             npm run test;
-             ./script/e2e-runner.sh;
-           fi'
-    - os: linux
-      node_js:
-        - 'stable'
-        - 'lts/*'
-      script:
-        - 'npm run lint'
-        - 'npm run test'
-        - 'if [[ ${TRAVIS_PULL_REQUEST_BRANCH:-$TRAVIS_BRANCH} = "master" && ${TRAVIS_NODE_VERSION} = "stable" ]]; then ./script/e2e-runner.sh; fi'
+node_js:
+  - 'stable'
+  - 'lts/*'
+
+script: npm run lint && npm run test