Add ember-data as a peer dep (#552)

* Add ember-data as a peer dep

* move ember-data to devDeps similar to ember-source

* no need for yarn update

* add e-d to new-app

package.json

@@ -59,7 +59,6 @@
     "ember-code-snippet": "^3.0.0",
     "ember-composable-helpers": "^4.2.2",
     "ember-concurrency": "^0.9.0 || ^0.10.0 || ^1.0.0",
-    "ember-data": "2.x - 3.x",
     "ember-fetch": "^8.0.2",
     "ember-get-config": "^0.2.4",
     "ember-href-to": "^4.0.0",
@@ -121,6 +120,7 @@
     "ember-cli-sri": "^2.1.1",
     "ember-cli-uglify": "^3.0.0",
     "ember-component-css": "^0.7.4",
+    "ember-data": "2.x - 3.x",
     "ember-disable-prototype-extensions": "^1.1.3",
     "ember-export-application-global": "^2.0.1",
     "ember-load-initializers": "^2.1.1",
@@ -143,6 +143,7 @@
     "release-it-lerna-changelog": "^2.3.0"
   },
   "peerDependencies": {
+    "ember-data": "2.x - 3.x",
     "ember-fetch": "^8.0.2"
   },
   "engines": {

test-apps/new-addon/package.json

@@ -30,6 +30,7 @@
     "ember-cli-dependency-checker": "*",
     "ember-cli-htmlbars": "*",
     "ember-cli-inject-live-reload": "*",
+    "ember-data": "*",
     "ember-fetch": "*",
     "ember-qunit": "*",
     "ember-cli-sri": "*",