Bump ember-inflector from 3.x to 4.x

[mydea]

To fix this deprecation warning in latest ember versions:

WARNING: [DEPRECATION] [DEPRECATION] Usage of the Ember Global is deprecated. You should import the Ember module or the specific API instead.

See https://deprecations.emberjs.com/v3.x/#toc_ember-global for details.

Usages of the Ember Global may be caused by an outdated ember-cli-babel dependency. The following steps may help:

* Upgrade the following addons to the latest version:
  * ember-can

### Important ###

In order to avoid repeatedly showing the same deprecation messages, no further deprecation messages will be shown for usages of the Ember Global until ember-cli-babel is upgraded to v7.26.6 or above.

To see all instances of this deprecation message, set the `EMBER_GLOBAL_DEPRECATIONS` environment variable to "all", e.g. `EMBER_GLOBAL_DEPRECATIONS=all ember test`.

### Details ###

Prior to v7.26.6, ember-cli-babel sometimes transpiled imports into the equivalent Ember Global API, potentially triggering this deprecation message indirectly, even when you did not observe these deprecated usages in your code.

The following outdated versions are found in your project:

* ember-cli-babel@6.18.0, currently used by:
  * ember-inflector@3.0.1
    * Depends on ember-cli-babel@^6.6.0
    * Added by ember-can@3.1.0

[ef4]

This is also important for embroider. This old copy of ember-inflector blows up if other copies are present, which is very common. The symptom looks like Cannot redefine property: pluralize.

[Exelord]

Thanks a lot!

[mydea]

Could we maybe get a release with this change? That would be awesome :)