[Tests] properly work around the bug, pending jestjs/jest#6792

Author: ljharb

package.json

@@ -45,14 +45,14 @@
     "eslint-config-airbnb-base": "^13.0.0",
     "eslint-plugin-import": "^2.13.0",
     "jest": "^23.4.2",
-    "jsdom": "~11.1.0",
     "react": "*",
     "rimraf": "^2.6.2"
   },
   "peerDependencies": {
     "react": "*"
   },
   "jest": {
+    "testURL": "http://localhost",
     "collectCoverageFrom": [
       "src/**",
       "!**/*.json"