build: update build tools

Author: mrholek

.browserslistrc

@@ -1,11 +1,11 @@
 # https://github.com/browserslist/browserslist#readme
 
->= 0.5%
-last 2 major versions
+[production]
+>0.2%
 not dead
-Chrome >= 60
-Firefox >= 60
-Firefox ESR
-iOS >= 12
-Safari >= 12
-not Explorer <= 11
+not op_mini all
+
+[development]
+last 1 chrome version
+last 1 firefox version
+last 1 safari version

.eslintrc.js

@@ -14,6 +14,7 @@ module.exports = {
   },
   extends: [
     'react-app',
+    'react-app/jest',
     'plugin:react/recommended', // Uses the recommended rules from @eslint-plugin-react
     'plugin:prettier/recommended', // Enables eslint-plugin-prettier and eslint-config-prettier. This will display prettier errors as ESLint errors. Make sure this is always the last configuration in the extends array.
   ],