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

Bumps [@salesforce/cli-plugins-testkit](https://github.com/salesforcecli/cli-plugins-testkit) from 5.1.1 to 5.1.3.
- [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@5.1.1...5.1.3)

---
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/plugin-command-snapshot": "^5.0.4",
     "@oclif/test": "^3.1.3",
-    "@salesforce/cli-plugins-testkit": "^5.1.1",
+    "@salesforce/cli-plugins-testkit": "^5.1.3",
     "@salesforce/dev-scripts": "^8.1.2",
     "@salesforce/kit": "^3.0.15",
     "@salesforce/plugin-command-reference": "^3.0.56",

yarn.lock

@@ -971,12 +971,12 @@
     istanbul-lib-report "^3.0.1"
     istanbul-reports "^3.1.6"
 
-"@salesforce/cli-plugins-testkit@^5.1.1":
-  version "5.1.1"
-  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.1.1.tgz#73baef2d27abc6cbb11c82e2869a3b4b57ff342d"
-  integrity sha512-qllBs+dGYIMS7GrJfJaalJSNsNohDAiLLHOZXk8WL+aZ1dRGDaWTiS4gyZKPKgeahXuNPTBxDqNg7WajvfNcxg==
+"@salesforce/cli-plugins-testkit@^5.1.3":
+  version "5.1.3"
+  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.1.3.tgz#5e7a7afebaa9a2c02eadbf533273d496335929d6"
+  integrity sha512-wmaiVR2Hr6AGUBdDF4M5xCEm4iczNdkm3lVlz8dU/8nISEAyNHOUkt2sB07Yx5oXoDMNNuuxM2DthxxMxxwzzA==
   dependencies:
-    "@salesforce/core" "^6.4.0"
+    "@salesforce/core" "^6.4.2"
     "@salesforce/kit" "^3.0.15"
     "@salesforce/ts-types" "^2.0.9"
     "@types/shelljs" "^0.8.15"