test: Added testURL in jest.config (#48)

Implemented fix from @jgoz to failing TI builds:

#47 (comment)

Author: smacpherson64

jest.config.js

@@ -2,5 +2,6 @@ const jestConfig = require('kcd-scripts/jest')
 
 module.exports = Object.assign(jestConfig, {
   testEnvironment: 'jest-environment-jsdom',
+  testURL: 'http://localhost/',
   setupTestFrameworkScriptFile: '<rootDir>/setupTests.js',
 })