Setup changelog generation with lerna-changelog.

Author: Robert Jackson

package.json

@@ -14,6 +14,7 @@
   },
   "scripts": {
     "build": "ember build",
+    "changelog": "lerna-changelog",
     "lint:hbs": "ember-template-lint .",
     "lint:js": "eslint .",
     "start": "ember serve",
@@ -50,12 +51,23 @@
     "ember-try": "^1.0.0",
     "eslint-plugin-ember": "^5.2.0",
     "eslint-plugin-node": "^7.0.1",
+    "lerna-changelog": "^0.8.0",
     "loader.js": "^4.7.0",
     "qunit-dom": "^0.7.1"
   },
   "engines": {
     "node": "6.* || 8.* || >= 10.*"
   },
+  "changelog": {
+    "repo": "mixonic/ember-cli-deprecation-workflow",
+    "labels": {
+      "breaking": ":boom: Breaking Change",
+      "enhancement": ":rocket: Enhancement",
+      "bug": ":bug: Bug Fix",
+      "documentation": ":memo: Documentation",
+      "internal": ":house: Internal"
+    }
+  },
   "ember-addon": {
     "configPath": "tests/dummy/config",
     "after": "ember-cli-htmlbars"