add continuous integration with travis (#10)

.travis.yml

@@ -1,47 +1,18 @@
----
 language: node_js
 node_js:
-  # we recommend testing addons with the same minimum supported node version as Ember CLI
-  # so that your addon works for all apps
-  - "6"
+  - "10.15"
 
-sudo: false
-dist: trusty
-
-addons:
-  chrome: stable
-
-cache:
-  directories:
-    - $HOME/.npm
-
-env:
-  global:
-    # See https://git.io/vdao3 for details.
-    - JOBS=1
-  matrix:
-    # we recommend new addons test the current and previous LTS
-    # as well as latest stable release (bonus points to beta/canary)
-    - EMBER_TRY_SCENARIO=ember-lts-2.12
-    - EMBER_TRY_SCENARIO=ember-lts-2.16
-    - EMBER_TRY_SCENARIO=ember-lts-2.18
-    - EMBER_TRY_SCENARIO=ember-release
-    - EMBER_TRY_SCENARIO=ember-beta
-    - EMBER_TRY_SCENARIO=ember-canary
-    - EMBER_TRY_SCENARIO=ember-default
+before_install:
+  - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.6.0
+  - export PATH="$HOME/.yarn/bin:$PATH"
 
-matrix:
-  fast_finish: true
-  allow_failures:
-    - env: EMBER_TRY_SCENARIO=ember-canary
+cache: yarn
 
-before_install:
-  - npm config set spin false
-  - npm install -g npm@4
-  - npm --version
+install:
+  - yarn install --frozen-lockfile --non-interactive
 
-script:
-  - npm run lint:js
-  # Usually, it's ok to finish the test scenario without reverting
-  #  to the addon's original dependency state, skipping "cleanup".
-  - node_modules/.bin/ember try:one $EMBER_TRY_SCENARIO --skip-cleanup
+jobs:
+  include:
+    - name: Test
+      script:
+        - yarn run test