Add automated release setup.

release-it requires Node 8+, so I added `--ignore-engines` to
installation in CI until we drop Node 6 support.

.travis.yml

@@ -37,12 +37,15 @@ jobs:
       node_js: 8
 
     - name: 'Floating Dependencies'
-      install: yarn install --no-lockfile --non-interactive
+      install: yarn install --no-lockfile --non-interactive --ignore-engines
 
 before_install:
   - curl -o- -L https://yarnpkg.com/install.sh | bash
   - export PATH=$HOME/.yarn/bin:$PATH
 
+install:
+  - yarn install --ignore-engines
+
 script:
   - yarn test
 

RELEASE.md

@@ -0,0 +1,41 @@
+# Release
+
+Releases are mostly automated using
+[release-it](https://github.com/release-it/release-it/) and
+[lerna-changelog](https://github.com/lerna/lerna-changelog/).
+
+
+## Preparation
+
+Since the majority of the actual release process is automated, the primary
+remaining task prior to releasing is confirming that all pull requests that
+have been merged since the last release have been labeled with the appropriate
+`lerna-changelog` labels and the titles have been updated to ensure they
+represent something that would make sense to our users. Some great information
+on why this is important can be found at
+[keepachangelog.com](https://keepachangelog.com/en/1.0.0/), but the overall
+guiding principles here is that changelogs are for humans, not machines.
+
+When reviewing merged PR's the labels to be used are:
+
+* breaking - Used when the PR is considered a breaking change.
+* enhancement - Used when the PR adds a new feature or enhancement.
+* bug - Used when the PR fixes a bug included in a previous release.
+* documentation - Used when the PR adds or updates documentation.
+* internal - Used for internal changes that still require a mention in the
+  changelog/release notes.
+
+
+## Release
+
+Once the prep work is completed, the actual release is straight forward:
+
+```
+yarn install
+yarn release
+```
+
+The `release` script leverages
+[release-it](https://github.com/release-it/release-it/) to do the mechanical
+release process. It will prompt you through the process of choosing the version
+number, tagging, pushing the tag and commits, etc.

package.json

@@ -3,9 +3,9 @@
   "version": "7.7.3",
   "description": "Ember CLI addon for Babel",
   "keywords": [
-    "ember-addon",
     "babel",
     "ember",
+    "ember-addon",
     "ember-cli",
     "transpile",
     "transpiler"
@@ -14,6 +14,10 @@
   "bugs": {
     "url": "https://github.com/babel/ember-cli-babel/issues"
   },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/babel/ember-cli-babel.git"
+  },
   "license": "MIT",
   "author": "Gordon Kristan",
   "files": [
@@ -24,19 +28,16 @@
     "doc": "doc",
     "test": "tests"
   },
-  "repository": {
-    "type": "git",
-    "url": "git://github.com/babel/ember-cli-babel.git"
-  },
   "scripts": {
     "build": "ember build",
     "changelog": "lerna-changelog",
     "lint:js": "eslint ./*.js addon addon-test-support app blueprints config lib server test-support tests",
+    "release": "release-it",
     "start": "ember serve",
-    "test:node": "mocha node-tests",
-    "test:node:debug": "mocha debug node-tests",
     "test": "mocha node-tests && ember test",
-    "test:all": "mocha node-tests && ember try:each"
+    "test:all": "mocha node-tests && ember try:each",
+    "test:node": "mocha node-tests",
+    "test:node:debug": "mocha debug node-tests"
   },
   "dependencies": {
     "@babel/core": "^7.0.0",
@@ -86,11 +87,16 @@
     "lerna-changelog": "^0.8.0",
     "loader.js": "^4.7.0",
     "mocha": "^5.2.0",
+    "release-it": "^12.2.1",
+    "release-it-lerna-changelog": "^1.0.3",
     "resolve": "^1.8.1"
   },
   "engines": {
     "node": "6.* || 8.* || >= 10.*"
   },
+  "publishConfig": {
+    "registry": "https://registry.npmjs.org"
+  },
   "changelog": {
     "repo": "babel/ember-cli-babel",
     "labels": {
@@ -103,5 +109,18 @@
   },
   "ember-addon": {
     "configPath": "tests/dummy/config"
+  },
+  "release-it": {
+    "plugins": {
+      "release-it-lerna-changelog": {
+        "infile": "CHANGELOG.md"
+      }
+    },
+    "git": {
+      "tagName": "v${version}"
+    },
+    "github": {
+      "release": true
+    }
   }
 }