chore: enable travis build

Author: gyoshev

.travis.yml

@@ -0,0 +1,26 @@
+sudo: false
+language: node_js
+cache:
+  directories:
+    - node_modules
+notifications:
+  email: false
+node_js:
+  - '6'
+env:
+  - CXX=g++-4.8
+addons:
+  apt:
+    sources:
+      - ubuntu-toolchain-r-test
+    packages:
+      - g++-4.8
+before_install:
+  - npm i -g npm@^3.8.0
+before_script:
+  - npm prune
+after_success:
+  - npm run semantic-release
+branches:
+  except:
+    - "/^v\\d+\\.\\d+\\.\\d+(\\-.*)?$/"