feat(deps): upgrade @testing-library/dom to 7.21.6

Bumps [@testing-library/dom](https://github.com/testing-library/dom-testing-library) from 7.20.0 to 7.21.6.
- [Release notes](https://github.com/testing-library/dom-testing-library/releases)
- [Changelog](https://github.com/testing-library/dom-testing-library/blob/master/CHANGELOG.md)
- [Commits](testing-library/dom-testing-library@v7.20.0...v7.21.6)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

yarn.lock

@@ -1803,14 +1803,14 @@
     "@sinonjs/commons" "^1.7.0"
 
 "@testing-library/dom@^7.0.4":
-  version "7.20.0"
-  resolved "https://registry.yarnpkg.com/@testing-library/dom/-/dom-7.20.0.tgz#2bab85e90f0221a56256c5d4741c2a36b7c45f4d"
-  integrity sha512-TywaC+qDGm/Ro34kRYkFQPdT+pxSF4UjZGLIqcGfFQH5IGR43Y7sGLPnkieIW/GNsu337oxNsLUAgpI0JWhXHw==
+  version "7.21.6"
+  resolved "https://registry.yarnpkg.com/@testing-library/dom/-/dom-7.21.6.tgz#e69349184e558472fe3f54eb67e6960d080925c3"
+  integrity sha512-Xj6AMM9Xb24NSeann91fmXFuyJEzZ1lpVgiaPiy/KY2pNX9y4OeDrEm2ZYZt6mfZgFSGZW0eEWpF7YfcvRq5LQ==
   dependencies:
     "@babel/runtime" "^7.10.3"
     "@types/aria-query" "^4.2.0"
     aria-query "^4.2.2"
-    dom-accessibility-api "^0.4.5"
+    dom-accessibility-api "^0.4.6"
     pretty-format "^25.5.0"
 
 "@textlint/ast-node-types@^4.0.3":
@@ -4028,10 +4028,10 @@ doctrine@^3.0.0:
   dependencies:
     esutils "^2.0.2"
 
-dom-accessibility-api@^0.4.5:
-  version "0.4.5"
-  resolved "https://registry.yarnpkg.com/dom-accessibility-api/-/dom-accessibility-api-0.4.5.tgz#d9c1cefa89f509d8cf132ab5d250004d755e76e3"
-  integrity sha512-HcPDilI95nKztbVikaN2vzwvmv0sE8Y2ZJFODy/m15n7mGXLeOKGiys9qWVbFbh+aq/KYj2lqMLybBOkYAEXqg==
+dom-accessibility-api@^0.4.6:
+  version "0.4.7"
+  resolved "https://registry.yarnpkg.com/dom-accessibility-api/-/dom-accessibility-api-0.4.7.tgz#31d01c113af49f323409b3ed09e56967aba485a8"
+  integrity sha512-5+GzhTpCQYHz4NjL8loYTDVBnXIjNLBadWQBKxXk+osFEplLt3EsSYBu2YZcdZ8QqrvCHgW6TSMGMbmgfhrn2g==
 
 dom-serializer@0:
   version "0.2.2"