Replace Enzyme with React Testing Library (#55)

Author: wojtekmaj

jest.config.json

@@ -1,5 +1,5 @@
 {
   "collectCoverageFrom": ["**/src/**.{js,jsx}", "!**/src/entry.js", "!**/src/entry.nostyle.js"],
-  "setupFiles": ["<rootDir>/jest.setup.js"],
+  "setupFilesAfterEnv": ["@testing-library/jest-dom"],
   "testEnvironment": "jsdom"
 }

jest.setup.js

@@ -49,8 +49,8 @@
     "@babel/core": "^7.15.0",
     "@babel/preset-env": "^7.15.0",
     "@babel/preset-react": "^7.14.0",
-    "@wojtekmaj/enzyme-adapter-react-17": "^0.6.0",
-    "enzyme": "^3.10.0",
+    "@testing-library/jest-dom": "^5.15.0",
+    "@testing-library/react": "^12.1.0",
     "eslint": "^8.5.0",
     "eslint-config-wojtekmaj": "^0.6.5",
     "husky": "^8.0.0",