Bump yeoman-test from 2.6.0 to 3.0.0

Bumps [yeoman-test](https://github.com/yeoman/yeoman-test) from 2.6.0 to 3.0.0.
- [Release notes](https://github.com/yeoman/yeoman-test/releases)
- [Commits](yeoman/yeoman-test@v2.6.0...v3.0.0)

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

package.json

@@ -38,7 +38,7 @@
         "fs-extra": "9.0.1",
         "mocha": "7.2.0",
         "yeoman-assert": "3.1.1",
-        "yeoman-test": "2.6.0"
+        "yeoman-test": "3.0.0"
     },
     "scripts": {
         "prettier:format": "prettier --write \"{,**/}*.{js,json,md,yml}\"",