chore(package): update babel-plugin-tester to version 9.1.0

Closes #159

Author: greenkeeper[bot]

package.json

@@ -61,7 +61,7 @@
     "@types/node": "^12.12.6",
     "@types/react-dom": "^16.9.4",
     "babel-plugin-dynamic-import-node": "^2.3.0",
-    "babel-plugin-tester": "^7.0.1",
+    "babel-plugin-tester": "^9.1.0",
     "conventional-changelog-cli": "^2.0.27",
     "enzyme": "^3.10.0",
     "enzyme-adapter-react-16": "^1.15.1",