Revert erroneously removed travis config, updated node versions

Author: risadams

.travis.yml

@@ -0,0 +1,32 @@
+language: node_js
+env:
+  matrix:
+    - TARGET=phantomjs
+    - TARGET=saucelabs
+  global:
+    - secure: df9eTd6JkMOgdF3J3UInb0ouaDEbF4Y0sklmvwgBUs38yRvGQ3mucrzH13dCU0GYW8mM/H9euF7yG4/leWQHoUYdRJTDRy/sWXGvs6qg7DTkUXsmGyzv/5XxS86WTD5B9LbzB1hvRs5nzWeA1sFP6rpzGG6HwogM/+37ijRjKQQ=
+    - secure: FI6ATM3Pngx0bowuYi5WHIDCe0R5ORlJWNsFxJyZLEusie+wZrRy9QbZsVvJGVYZJKAR9MFT3Ks494ou85lyfUnfvEnn+lX2DQ3Hsyz0xyBNoSvNkQbhZEsUr0TV+UGpCvSwYr6lYqXsBy6VxqyAkXDkqdVTAzMydq5ttGxszPU=
+    - secure: "ctyTk+LdMsch1jTRLLTboJW2TsJCIRtXktEQ86JdGteg0YSvsqDj/LndUaaGZ2ZSR3sSJ1Q/YV1X0M0VizrzX5I7/3WnKViyeKygJ5sSbTuqkjwFa2sAAmrnmBv9JWofIc2XuRG3tfZv2fX6QMDy5PA72KGPBmGAw4S8WTxGkHQ="
+matrix:
+  allow_failures:
+    - env: TARGET=saucelabs
+node_js:
+  - '6'
+  - '8'
+  - '9'
+  - '10'
+  - '11'
+  - '12'
+  - '13'
+  - '14'
+  - '15'
+before_script:
+  - npm install -g bower
+  - npm install -g grunt-cli
+  - npm install
+  - make
+script:
+  - export COMMIT_MESSAGE=$(git show -s --format=%B $TRAVIS_COMMIT | tr -d '\n')
+  - export TRAVIS_CI=1
+  - if [[ "${TARGET}" == "phantomjs" ]]; then npm test || exit 1; fi
+  - if [[ "${TARGET}" == "saucelabs" ]]; then (for x in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do export SAUCELABS_BATCH=$x; echo "Starting batch $x of 15"; npm test || true; done); fi