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

Bumps [@salesforce/cli-plugins-testkit](https://github.com/salesforcecli/cli-plugins-testkit) from 5.1.8 to 5.1.9.
- [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@5.1.8...5.1.9)

---
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]>

Author: dependabot[bot]

package.json

@@ -16,7 +16,7 @@
   },
   "devDependencies": {
     "@oclif/plugin-command-snapshot": "^5.0.7",
-    "@salesforce/cli-plugins-testkit": "^5.1.8",
+    "@salesforce/cli-plugins-testkit": "^5.1.9",
     "@salesforce/dev-scripts": "^8.3.0",
     "@salesforce/plugin-command-reference": "^3.0.67",
     "@types/color-convert": "^2.0.3",

yarn.lock

@@ -1639,12 +1639,12 @@
     istanbul-reports "^3.1.6"
     jsforce "^2.0.0-beta.29"
 
-"@salesforce/cli-plugins-testkit@^5.1.8":
-  version "5.1.8"
-  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.1.8.tgz#789630cc389c13fe016c7593aa4ac8bbf532e3bd"
-  integrity sha512-3/jvEc+RVWFRbGPtyEzNJ5eb84p7HuLYDZ1EAokLVgDpnW5qy9UpBWrU0Tv98MaQhfRtPdSc/gmzB6m6nqWZLg==
+"@salesforce/cli-plugins-testkit@^5.1.9":
+  version "5.1.9"
+  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.1.9.tgz#c21b0d282c0d309141ca5e2fe47835530a24621d"
+  integrity sha512-8a9dwYdo2tXhVMrDe4ex8tjMYGuIwT9wlltB4+h3gt/IuowazjQGy5VWam08gsm3UT/FhhjZBdN0aKJPbD4wXA==
   dependencies:
-    "@salesforce/core" "^6.5.1"
+    "@salesforce/core" "^6.5.3"
     "@salesforce/kit" "^3.0.15"
     "@salesforce/ts-types" "^2.0.9"
     "@types/shelljs" "^0.8.15"