chore(deps): update dependency ember-cli to v3.15.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
ember-cli (source)	devDependencies	minor	3.14.0 -> 3.15.0

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Release Notes

ember-cli/ember-cli

### [`v3.15.0`](https://togithub.com/ember-cli/ember-cli/releases/v3.15.0) [Compare Source](https://togithub.com/ember-cli/ember-cli/compare/v3.14.0...v3.15.0) ##### Blueprint Changes - [`ember new` diff](https://togithub.com/ember-cli/ember-new-output/compare/v3.14.0...v3.15.0) - [`ember addon` diff](https://togithub.com/ember-cli/ember-addon-output/compare/v3.14.0...v3.15.0) ##### Changelog - [#​8963](https://togithub.com/ember-cli/ember-cli/pull/8963) Remove `app/templates/components` [@​chancancode](https://togithub.com/chancancode) - [#​8964](https://togithub.com/ember-cli/ember-cli/pull/8964) Add support for `ember new @​scope-here/name-here`. [@​rwjblue](https://togithub.com/rwjblue) - [#​8965](https://togithub.com/ember-cli/ember-cli/pull/8965) Update ember-resolver to v7.0.0. [@​rwjblue](https://togithub.com/rwjblue) - [#​8971](https://togithub.com/ember-cli/ember-cli/pull/8971) Add an ember-try scenario for Ember "classic" (pre-octane). [@​rwjblue](https://togithub.com/rwjblue) - [#​8972](https://togithub.com/ember-cli/ember-cli/pull/8972) Update ember-data to 3.15.0. [@​rwjblue](https://togithub.com/rwjblue) - [#​8933](https://togithub.com/ember-cli/ember-cli/pull/8933) Remove `app/resolver.js` in favor of importing in `app/app.js` [@​rwjblue](https://togithub.com/rwjblue) - [#​8945](https://togithub.com/ember-cli/ember-cli/pull/8945) Fix issue with addon `.travis.yml` configuration when using `npm` [@​kellyselden](https://togithub.com/kellyselden) - [#​8946](https://togithub.com/ember-cli/ember-cli/pull/8946) Drop testing of ember-source@3.4 in the addon blueprints ember-try config [@​kellyselden](https://togithub.com/kellyselden) - [#​8946](https://togithub.com/ember-cli/ember-cli/pull/8946) Add testing of ember-source@3.12 in the addon blueprints ember-try config [@​kellyselden](https://togithub.com/kellyselden) - [#​8959](https://togithub.com/ember-cli/ember-cli/pull/8959) Fix issue with addon discovery when npm/yarn leave empty directories in resolvable locations [@​stefanpenner](https://togithub.com/stefanpenner) - [#​8961](https://togithub.com/ember-cli/ember-cli/pull/8961) Prepare for Octane release in 3.15 [@​rwjblue](https://togithub.com/rwjblue) - Adds `ember` property to `package.json` to implement [emberjs/rfcs#​558](https://togithub.com/emberjs/rfcs/pull/558) - Adds `@glimmer/component@1.0.0` as a development dependency for both apps and addons - Updates `ember-try` to at least 1.4.0 in order to support `config/ember-try.js` scenarios with `ember` `package.json` property (mentioned in [emberjs/rfcs#​558](https://togithub.com/emberjs/rfcs/issues/558)) - Enables Octane related optional features - Updates ember-template-lint configuration to use `octane` preset - Update to ember-source@3.15 stable - Updates all packages in the application blueprint to their latest version - [#​8827](https://togithub.com/ember-cli/ember-cli/pull/8827) Remove module-unification blueprints [@​dcyriller](https://togithub.com/dcyriller) - [#​8878](https://togithub.com/ember-cli/ember-cli/pull/8878) Adds flag to throw an error for invalid addon locations [@​tmquinn](https://togithub.com/tmquinn) - [#​8906](https://togithub.com/ember-cli/ember-cli/pull/8906) Enable broccoli memoization by default in Ember-CLI [@​SparshithNR](https://togithub.com/SparshithNR) - [#​8917](https://togithub.com/ember-cli/ember-cli/pull/8917) Update CI configuration for applications using `npm` to run a "floating dependencies" test. [@​kellyselden](https://togithub.com/kellyselden) - [#​8926](https://togithub.com/ember-cli/ember-cli/pull/8926) Add `application` to invalid names [@​kennethlarsen](https://togithub.com/kennethlarsen) Thank you to all who took the time to contribute!

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