chore: replace travis-deploy-once with travis-ci stage (#136)

Fixes #133

.travis.yml

@@ -18,6 +18,13 @@ env:
     # See https://git.io/vdao3 for details.
     - JOBS=1
 
+stages:
+  - 'Tests'
+  - 'Additional Tests'
+  - 'Canary Tests'
+  - name: 'Deploy'
+    if: branch = master AND type = push
+
 jobs:
   fail_fast: true
   allow_failures:
@@ -48,11 +55,18 @@ jobs:
     - env: EMBER_TRY_SCENARIO=ember-release
     - env: EMBER_TRY_SCENARIO=ember-beta
     - env: EMBER_TRY_SCENARIO=ember-default-with-jquery
+
     - stage: 'Canary Tests'
       script:
         - node_modules/.bin/ember try:one $EMBER_TRY_SCENARIO
       env: EMBER_TRY_SCENARIO=ember-canary
 
+    - stage: 'Deploy'
+      name: 'Publish to npm'
+      install:
+        - yarn install --non-interactive
+      script: yarn semantic-release
+
 before_install:
   - curl -o- -L https://yarnpkg.com/install.sh | bash
   - export PATH=$HOME/.yarn/bin:$PATH
@@ -61,4 +75,4 @@ install:
   - yarn install --no-lockfile --non-interactive
 
 script:
-  - node_modules/.bin/ember try:one $EMBER_TRY_SCENARIO && yarn travis-deploy-once "yarn semantic-release"
+  - node_modules/.bin/ember try:one $EMBER_TRY_SCENARIO

package.json

@@ -8,7 +8,8 @@
     "lint:js": "eslint .",
     "start": "ember serve",
     "test": "ember test",
-    "test:all": "ember try:each"
+    "test:all": "ember try:each",
+    "semantic-release": "semantic-release"
   },
   "engines": {
     "node": "6.* || 8.* || >= 10.*"
@@ -47,8 +48,7 @@
     "husky": "1.2.0",
     "loader.js": "4.7.0",
     "qunit-dom": "0.8.1",
-    "semantic-release": "15.12.3",
-    "travis-deploy-once": "5.0.9"
+    "semantic-release": "15.12.3"
   },
   "keywords": [
     "ember-addon"

yarn.lock

@@ -11338,7 +11338,7 @@ traverse@~0.6.6:
   resolved "https://registry.yarnpkg.com/traverse/-/traverse-0.6.6.tgz#cbdf560fd7b9af632502fed40f918c157ea97137"
   integrity sha1-y99WD9e5r2MlAv7UD5GMFX6pcTc=
 
-travis-deploy-once@5.0.9, travis-deploy-once@^5.0.9:
+travis-deploy-once@^5.0.9:
   version "5.0.9"
   resolved "https://registry.yarnpkg.com/travis-deploy-once/-/travis-deploy-once-5.0.9.tgz#c5a2f639e17d8fd542f66d25ade126179d5e8acf"
   integrity sha512-cyHFErzq0HTEGY29RAq1clqFdt/IkCrlcOmyM1cGoGnEyukrrFi1fpy6JH3Mlf+88XsFwvluqKVWzj2bdz3k8A==