Update lint rules

modern/.eslintrc.js

@@ -6,26 +6,21 @@ module.exports = {
   plugins: [
     'react',
   ],
-  ignorePatterns: ['switcher.js', 'theme.js'],
+  ignorePatterns: ['build/', 'switcher.js', 'theme.js'],
   rules: {
     'max-len': [0],
-    'no-shadow': [0],
-    'no-return-assign': [0],
     'no-param-reassign': [0],
     'no-prototype-builtins': [0],
-    'no-nested-ternary': [0],
-    'operator-linebreak': [0],
-    'import/no-unresolved': [0],
     'object-curly-newline': [1, {
       ObjectExpression: { minProperties: 8, multiline: true, consistent: true },
       ObjectPattern: { minProperties: 8, multiline: true, consistent: true },
       ImportDeclaration: { minProperties: 4, multiline: true, consistent: true },
       ExportDeclaration: { minProperties: 4, multiline: true, consistent: true },
     }],
-    'react/jsx-filename-extension': [1, { extensions: ['.js'] }],
-    'react/function-component-definition': [1, { namedComponents: 'arrow-function', unnamedComponents: 'arrow-function' }],
+    'react/function-component-definition': [1, {
+      namedComponents: 'arrow-function',
+      unnamedComponents: 'arrow-function',
+    }],
     'react/prop-types': [0],
-    'react/jsx-props-no-spreading': [0],
-    'jsx-a11y/anchor-is-valid': [0],
   },
 };