feat: Merge pull request #9 from pelias/update-travis

update travis config to be like other packages

.travis.yml

@@ -1,33 +1,20 @@
 sudo: false
 language: node_js
-cache:
-  directories:
-    - node_modules
 notifications:
   email: false
 node_js:
   - 4
   - 6
 matrix:
-    fast_finish: true
-    allow_failures:
+  fast_finish: true
 env:
   global:
-    - CXX=g++-4.8
-script: "npm run travis"
-addons:
-  apt:
-    sources:
-      - ubuntu-toolchain-r-test
-    packages:
-      - g++-4.8
+    - BUILD_LEADER_ID=2
+script: npm run travis
 before_install:
-  - npm i -g npm@^2.0.0
+  - npm i -g npm@^3.0.0
 before_script:
   - npm prune
 after_success:
-  - 'curl -Lo travis_after_all.py https://git.io/travis_after_all'
-  - python travis_after_all.py
-  - export $(cat .to_export_back) &> /dev/null
   - npm install -g npx
   - npx -p node@8 npm run semantic-release