Bump babel-plugin-tester from 8.0.1 to 9.0.1

Bumps [babel-plugin-tester](https://github.com/babel-utils/babel-plugin-tester) from 8.0.1 to 9.0.1.
- [Release notes](https://github.com/babel-utils/babel-plugin-tester/releases)
- [Changelog](https://github.com/babel-utils/babel-plugin-tester/blob/master/CHANGELOG.md)
- [Commits](babel-utils/babel-plugin-tester@v8.0.1...v9.0.1)

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

package.json

@@ -20,7 +20,7 @@
     "@babel/core": "^7.4.0",
     "@babel/preset-env": "^7.7.4",
     "babel-jest": "^26.0.1",
-    "babel-plugin-tester": "^8.0.0",
+    "babel-plugin-tester": "^9.0.1",
     "eslint": "^6.0.0",
     "eslint-config-standard": "^14.0.0",
     "eslint-plugin-import": "^2.9.0",