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

Bumps [@salesforce/cli-plugins-testkit](https://github.com/salesforcecli/cli-plugins-testkit) from 3.2.18 to 3.2.21.
- [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@3.2.18...3.2.21)

---
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

@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "@oclif/plugin-command-snapshot": "^3.3.4",
-    "@salesforce/cli-plugins-testkit": "^3.2.18",
+    "@salesforce/cli-plugins-testkit": "^3.2.21",
     "@salesforce/dev-config": "^3.1.0",
     "@salesforce/dev-scripts": "^4.0.0-beta.9",
     "@salesforce/plugin-command-reference": "^2.2.9",

yarn.lock

@@ -1010,12 +1010,12 @@
     mv "~2"
     safe-json-stringify "~1"
 
-"@salesforce/cli-plugins-testkit@^3.2.18":
-  version "3.2.18"
-  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-3.2.18.tgz#6c2857cef50a0035205a4150c6d609f36e3b0fae"
-  integrity sha512-tfm1lYPYcOsx9+ELUx+b9ZbAD5mOIhtvGjqpG3/NG1jeghLNPjbDDX6bL1ottw/+mYBVymIrj1krhKxOUpqJCw==
+"@salesforce/cli-plugins-testkit@^3.2.21":
+  version "3.2.21"
+  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-3.2.21.tgz#14cd8f61b9c2963f46abaa75d82780c92a91695c"
+  integrity sha512-1t4marMV6ZQQu4oHUg/UnctldhTw+hcC3Tr8uIvCz8HxiWpRkUqtstDV3TCXU9mzNa+tIM2DeoxUtamtDYHP3Q==
   dependencies:
-    "@salesforce/core" "^3.32.12"
+    "@salesforce/core" "^3.33.1"
     "@salesforce/kit" "^1.8.0"
     "@salesforce/ts-types" "^1.7.2"
     "@types/shelljs" "^0.8.11"