fix(deps): update dependency ember-modifier to v2.1.2

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This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ember-modifier	2.1.1 -> 2.1.2

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Release Notes

ember-modifier/ember-modifier

### [`v2.1.2`](https://togithub.com/ember-modifier/ember-modifier/blob/master/CHANGELOG.md#v212-2021-05-28) [Compare Source](https://togithub.com/ember-modifier/ember-modifier/compare/v2.1.1...v2.1.2) ##### :bug: Bug Fix - [#​87](https://togithub.com/ember-modifier/ember-modifier/pull/87) Add support for `3.22` modifier capabilities ([@​sandydoo](https://togithub.com/sandydoo)) ##### :house: Internal - [#​77](https://togithub.com/ember-modifier/ember-modifier/pull/77) migrate from TravisCI to GitHub Actions ([@​jelhan](https://togithub.com/jelhan)) - [#​70](https://togithub.com/ember-modifier/ember-modifier/pull/70) small typo ([@​bartocc](https://togithub.com/bartocc)) ##### Committers: 3 - Jeldrik Hanschke ([@​jelhan](https://togithub.com/jelhan)) - Julien Palmas ([@​bartocc](https://togithub.com/bartocc)) - Sander Melnikov ([@​sandydoo](https://togithub.com/sandydoo))

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