Bump ember-cli-babel from 6.17.2 to 7.1.2

Bumps [ember-cli-babel](https://github.com/babel/ember-cli-babel) from 6.17.2 to 7.1.2.
- [Release notes](https://github.com/babel/ember-cli-babel/releases)
- [Changelog](https://github.com/babel/ember-cli-babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/ember-cli-babel/commits/v7.1.2)

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

package.json

@@ -34,7 +34,7 @@
   "dependencies": {
     "broccoli-funnel": "^2.0.1",
     "ember-assign-polyfill": "~2.4.0",
-    "ember-cli-babel": "^6.12.0",
+    "ember-cli-babel": "^7.1.2",
     "ember-cli-htmlbars-inline-precompile": "^1.0.0"
   },
   "devDependencies": {