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

Bumps [@salesforce/cli-plugins-testkit](https://github.com/salesforcecli/cli-plugins-testkit) from 5.3.17 to 5.3.18.
- [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@5.3.17...5.3.18)

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

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

Author: dependabot[bot]

package.json

@@ -14,7 +14,7 @@
   "devDependencies": {
     "@oclif/core": "^4.0.8",
     "@oclif/plugin-command-snapshot": "^5.2.3",
-    "@salesforce/cli-plugins-testkit": "^5.3.17",
+    "@salesforce/cli-plugins-testkit": "^5.3.18",
     "@salesforce/dev-scripts": "^10.2.2",
     "@salesforce/plugin-command-reference": "^3.1.8",
     "eslint-plugin-sf-plugin": "^1.18.10",

yarn.lock

@@ -1326,12 +1326,12 @@
     istanbul-lib-report "^3.0.1"
     istanbul-reports "^3.1.7"
 
-"@salesforce/cli-plugins-testkit@^5.3.17":
-  version "5.3.17"
-  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.3.17.tgz#b1a66508cf7a5d235d4fe30cf6b0045776ef7a2f"
-  integrity sha512-+cPyjXfuVD3pYjm+EGYC4JowoYq8QXRyTTDlZTVPD8VBe/byyXzxdphjK5gIuKhBYvKwWN1kT3zbno25U49ljQ==
+"@salesforce/cli-plugins-testkit@^5.3.18":
+  version "5.3.18"
+  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.3.18.tgz#f36ae6ed8573b18396668a4d38b4effe0bd1a2bf"
+  integrity sha512-9+Yvmw5idIQryJcXVKZ2HASLKj2RUJizDuDFPq5ut9X+8y8MTWAkO0hO6OSj3IPkV+LTo8QF7QOCl16R2PWpMw==
   dependencies:
-    "@salesforce/core" "^8.1.0"
+    "@salesforce/core" "^8.1.1"
     "@salesforce/kit" "^3.1.6"
     "@salesforce/ts-types" "^2.0.10"
     "@types/shelljs" "^0.8.15"