chore: update jest (#21)

Author: SimenB

jest.config.js

@@ -2,6 +2,7 @@ module.exports = {
     // Automatically clear mock calls and instances between every test
     clearMocks: true,
     roots: ["<rootDir>/src/"],
+    testEnvironment: "jsdom",
     watchPlugins: [
         "jest-watch-typeahead/filename",
         "jest-watch-typeahead/testname",