Bump ember-cli from 3.15.2 to 3.16.0 (#491)

* Bump ember-cli from 3.15.2 to 3.16.0

Bumps [ember-cli](https://github.com/ember-cli/ember-cli) from 3.15.2 to 3.16.0.
- [Release notes](https://github.com/ember-cli/ember-cli/releases)
- [Changelog](https://github.com/ember-cli/ember-cli/blob/master/CHANGELOG.md)
- [Commits](ember-cli/ember-cli@v3.15.2...v3.16.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

* Blueprint updates for ember-cli@3.16.0

Co-authored-by: Kevin Pfefferle <kevin@pfefferle.co>

Author: dependabot-preview[bot]

.circleci/config.yml

@@ -1,7 +1,7 @@
 # .circleci/config.yml
 defaults: &defaults
   docker:
-    - image: circleci/node:8
+    - image: circleci/node:10
       environment:
         JOBS: 2
   working_directory: ~/ember-cli-deploy-cloudfront

.editorconfig

@@ -4,7 +4,6 @@
 
 root = true
 
-
 [*]
 end_of_line = lf
 charset = utf-8

package.json

@@ -27,14 +27,14 @@
   "devDependencies": {
     "chai": "^4.1.2",
     "chai-as-promised": "^7.1.1",
-    "ember-cli": "~3.15.1",
+    "ember-cli": "~3.16.0",
     "ember-cli-release": "^1.0.0-beta.2",
     "eslint": "^6.0.1",
     "glob": "^7.1.2",
     "mocha": "^7.0.0"
   },
   "engines": {
-    "node": "8.* || >= 10.*"
+    "node": "10.* || >= 12"
   },
   "ember-addon": {}
 }