Auto merge of #4275 - rust-lang:renovate/ember-cli-babel-7.x, r=Turbo87

Update dependency ember-cli-babel to v7.26.7

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [ember-cli-babel](https://togithub.com/babel/ember-cli-babel) | [`7.26.6` -> `7.26.7`](https://renovatebot.com/diffs/npm/ember-cli-babel/7.26.6/7.26.7) | [![age](https://badges.renovateapi.com/packages/npm/ember-cli-babel/7.26.7/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/npm/ember-cli-babel/7.26.7/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/npm/ember-cli-babel/7.26.7/compatibility-slim/7.26.6)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/npm/ember-cli-babel/7.26.7/confidence-slim/7.26.6)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>babel/ember-cli-babel</summary>

### [`v7.26.7`](https://togithub.com/babel/ember-cli-babel/blob/HEAD/CHANGELOG.md#v7267-2021-12-15)

[Compare Source](https://togithub.com/babel/ember-cli-babel/compare/v7.26.6...v7.26.7)

##### 🐛 Bug Fix

-   [#&#8203;421](https://togithub.com/babel/ember-cli-babel/pull/421) introduce cacheKeyForTree to avoid running treeForX multiple times ([`@&#8203;RuslanZavacky](https://togithub.com/RuslanZavacky))`
-   [#&#8203;420](https://togithub.com/babel/ember-cli-babel/pull/420) Properly handle class properties proposal ([`@&#8203;chriskrycho](https://togithub.com/chriskrycho))`

##### Committers: 2

-   Chris Krycho ([`@&#8203;chriskrycho](https://togithub.com/chriskrycho))`
-   Ruslan Zavacky ([`@&#8203;RuslanZavacky](https://togithub.com/RuslanZavacky))`

</details>

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Author: bors

package.json

@@ -71,7 +71,7 @@
     "ember-auto-import": "2.2.4",
     "ember-cli": "3.28.4",
     "ember-cli-app-version": "5.0.0",
-    "ember-cli-babel": "7.26.6",
+    "ember-cli-babel": "7.26.7",
     "ember-cli-bundle-analyzer": "0.2.2",
     "ember-cli-code-coverage": "1.0.3",
     "ember-cli-dependency-checker": "3.2.0",