feat(travis-ci): add .travis.yml [triage-skip] (#9)

* feat(travis-ci): add .travis.yml [triage-skip]

* docs(*): add travis badge to README files

* fix(travis): include C++11 Standard Compiler

Node.js v4.0 and greater requires a C++11 standard-compliant compiler
(See: https://docs.travis-ci.com/user/languages/javascript-with-nodejs#Node.js-v4-(or-io.js-v3)-compiler-requirements)

* refactor(travis): turn on caching for .travis.yml to improve build times

* refactor(travis): limit push builds to the master branch

* refactor(deps): bump karma version

.travis.yml

@@ -0,0 +1,23 @@
+sudo: required
+dist: trusty
+language: node_js
+node_js: stable
+env:
+  - CXX=g++-4.8
+cache: yarn
+addons:
+  firefox: latest
+  apt:
+    sources:
+      - google-chrome
+      - ubuntu-toolchain-r-test
+    packages:
+      - google-chrome-stable
+      - g++-4.8
+before_script:
+  - "export DISPLAY=:99.0"
+script:
+  - xvfb-run npm test
+branches:
+  only:
+    - master

README.md

@@ -1,3 +1,5 @@
+[![Build Status](https://travis-ci.org/firebase/firebase-js-sdk.svg?branch=master)](https://travis-ci.org/firebase/firebase-js-sdk)
+
 # Firebase Javascript SDK
 
 The Firebase JavaScript SDK implements the client-side libraries used by

README.public.md

@@ -1,5 +1,6 @@
-# Firebase - App success made simple
+[![Build Status](https://travis-ci.org/firebase/firebase-js-sdk.svg?branch=master)](https://travis-ci.org/firebase/firebase-js-sdk)
 
+# Firebase - App success made simple
 
 ## Overview
 

package.json

@@ -64,7 +64,7 @@
     "gzip-size": "^3.0.0",
     "husky": "^0.13.3",
     "jsdom": "^9.12.0",
-    "karma": "^1.5.0",
+    "karma": "^1.7.0",
     "karma-chrome-launcher": "^2.0.0",
     "karma-firefox-launcher": "^1.0.1",
     "karma-mocha": "^1.3.0",

yarn.lock

@@ -3564,9 +3564,9 @@ karma-typescript@^3.0.1:
     util "~0.10.1"
     vm-browserify "~0.0.1"
 
-karma@^1.5.0:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/karma/-/karma-1.6.0.tgz#0e871d4527d5eac56c41d181f03c5c0a7e6dbf3e"
+karma@^1.7.0:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/karma/-/karma-1.7.0.tgz#6f7a1a406446fa2e187ec95398698f4cee476269"
   dependencies:
     bluebird "^3.3.0"
     body-parser "^1.16.1"