chore(dev-deps): bump @salesforce/cli-plugins-testkit

Bumps [@salesforce/cli-plugins-testkit](https://github.com/salesforcecli/cli-plugins-testkit) from 5.3.19 to 5.3.20.
- [Release notes](https://github.com/salesforcecli/cli-plugins-testkit/releases)
- [Changelog](https://github.com/salesforcecli/cli-plugins-testkit/blob/main/CHANGELOG.md)
- [Commits](salesforcecli/cli-plugins-testkit@5.3.19...5.3.20)

---
updated-dependencies:
- dependency-name: "@salesforce/cli-plugins-testkit"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -13,7 +13,7 @@
   "devDependencies": {
     "@oclif/core": "^4.0.16",
     "@oclif/plugin-command-snapshot": "^5.2.9",
-    "@salesforce/cli-plugins-testkit": "^5.3.19",
+    "@salesforce/cli-plugins-testkit": "^5.3.20",
     "@salesforce/dev-scripts": "^10.2.4",
     "@salesforce/plugin-command-reference": "^3.1.10",
     "chai-each": "^0.0.1",

yarn.lock

@@ -1385,12 +1385,12 @@
   resolved "https://registry.yarnpkg.com/@pkgjs/parseargs/-/parseargs-0.11.0.tgz#a77ea742fab25775145434eb1d2328cf5013ac33"
   integrity sha512-+1VkjdD0QBLPodGrJUeqarH8VAIvQODIbwh9XpP5Syisf7YoQgsJKPNFoqqLQlu+VQ/tVSshMR6loPMn8U+dPg==
 
-"@salesforce/cli-plugins-testkit@^5.3.19":
-  version "5.3.19"
-  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.3.19.tgz#495e7516a6046c42fc7cf60b11894d8922dd01aa"
-  integrity sha512-4mRlszh1q6bPw7dF4EHbYJ2IFxAanzKBbauZ5pSUHt+++otASmANoPc3TZ4CzNDG3rbt+5qFLnhhaQWMli0Nqw==
+"@salesforce/cli-plugins-testkit@^5.3.20":
+  version "5.3.20"
+  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.3.20.tgz#03ecb0fe32345a8d468101d2c34bdd7235196b39"
+  integrity sha512-MRY3o8TXmiRmdDQ4orwnGhbxFHqX5xCKvGTIYwPRGSgMs2RHyyPrWrtS+aSC3IINEFJX7NSsXluTJIgl1R2fPA==
   dependencies:
-    "@salesforce/core" "^8.2.1"
+    "@salesforce/core" "^8.2.3"
     "@salesforce/kit" "^3.1.6"
     "@salesforce/ts-types" "^2.0.10"
     "@types/shelljs" "^0.8.15"