fix(deps): bump @salesforce/cli-plugins-testkit from 5.3.15 to 5.3.18

Bumps [@salesforce/cli-plugins-testkit](https://github.com/salesforcecli/cli-plugins-testkit) from 5.3.15 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@5.3.15...5.3.18)

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

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

package.json

@@ -13,7 +13,7 @@
     "@octokit/core": "^4.2.4",
     "@octokit/plugin-paginate-rest": "^6.1.2",
     "@octokit/plugin-throttling": "^5.2.3",
-    "@salesforce/cli-plugins-testkit": "^5.3.15",
+    "@salesforce/cli-plugins-testkit": "^5.3.18",
     "@salesforce/core": "^8.1.0",
     "@salesforce/kit": "^3.1.6",
     "@salesforce/plugin-command-reference": "^3.1.5",

yarn.lock

@@ -1742,12 +1742,12 @@
   resolved "https://registry.npmjs.org/@pkgjs/parseargs/-/parseargs-0.11.0.tgz"
   integrity sha512-+1VkjdD0QBLPodGrJUeqarH8VAIvQODIbwh9XpP5Syisf7YoQgsJKPNFoqqLQlu+VQ/tVSshMR6loPMn8U+dPg==
 
-"@salesforce/cli-plugins-testkit@^5.3.15":
-  version "5.3.15"
-  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.3.15.tgz#a7e240119bbc987e869873c5a3ce3d70abbfe120"
-  integrity sha512-nst9ZKu7pqkR4Ayf3klbg4/41CmxJuLzdBL9EqGNZyZgKXBw1g+nlCcfvV9q1sY3LF2L2ljsC8N8phqiFoDKOQ==
+"@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" "^8.0.1"
+    "@salesforce/core" "^8.1.1"
     "@salesforce/kit" "^3.1.6"
     "@salesforce/ts-types" "^2.0.10"
     "@types/shelljs" "^0.8.15"
@@ -1758,10 +1758,10 @@
     strip-ansi "6.0.1"
     ts-retry-promise "^0.8.1"
 
-"@salesforce/core@^8.0.1", "@salesforce/core@^8.0.3", "@salesforce/core@^8.1.0":
-  version "8.1.0"
-  resolved "https://registry.yarnpkg.com/@salesforce/core/-/core-8.1.0.tgz#8ee25acdacf9d70a6249907a2fe3503461f18766"
-  integrity sha512-oItr8cdeMe67glJN3dP1Gh/kasD0DUT6S6RfcLTH32wwuZNQAwMXNgBOCvlskr8nxPZ+YSSw7CVuqYMUmCtUXA==
+"@salesforce/core@^8.0.1", "@salesforce/core@^8.0.3", "@salesforce/core@^8.1.0", "@salesforce/core@^8.1.1":
+  version "8.1.1"
+  resolved "https://registry.yarnpkg.com/@salesforce/core/-/core-8.1.1.tgz#26db4e6da3573c4bd223eb05cb3da6aad8b2a311"
+  integrity sha512-PQ58kz0oRk/cjGhmiRj8W+x0Eg2mrWagrA4xMKaXjBAgSgU+V39BaO9IC1G2cAMGy53JJRBO5G876ala4gD44w==
   dependencies:
     "@jsforce/jsforce-node" "^3.2.1"
     "@salesforce/kit" "^3.1.6"