feat: support ESLint 8.x

BREAKING CHANGE: Requires ESLint@^8.0.0

index.js

@@ -172,6 +172,7 @@ module.exports = {
     'no-unsafe-optional-chaining': 'error',
     'no-unused-expressions': 'off',
     'no-unused-labels': 'error',
+    'no-unused-private-class-members': 'error',
     'no-unused-vars': [
       'error',
       {
@@ -208,6 +209,7 @@ module.exports = {
     'prefer-exponentiation-operator': 'warn',
     'prefer-named-capture-group': 'off', // maybe one day... But I'm not used to it yet.
     'prefer-numeric-literals': 'error',
+    'prefer-object-has-own': 'error',
     'prefer-object-spread': 'warn',
     'prefer-promise-reject-errors': 'off', // maybe one day... Not sure I'm in...
     'prefer-regex-literals': 'off',

jest.js

@@ -36,7 +36,6 @@ const rules = {
 
   'jest/consistent-test-it': 'off',
   'jest/expect-expect': 'off',
-  'jest/lowercase-name': 'off',
   'jest/max-nested-describe': 'error',
   'jest/no-alias-methods': 'off',
   'jest/no-commented-out-tests': 'warn',
@@ -59,17 +58,13 @@ const rules = {
   'jest/no-standalone-expect': 'off',
   'jest/no-test-prefixes': 'error',
   'jest/no-test-return-statement': 'off',
-  'jest/no-truthy-falsy': 'off',
-  'jest/no-try-expect': 'error',
   'jest/prefer-called-with': 'error',
   'jest/prefer-expect-assertions': 'off',
   'jest/prefer-expect-resolves': 'off',
   'jest/prefer-hooks-on-top': 'error',
-  'jest/prefer-inline-snapshots': 'off',
+  'jest/prefer-lowercase-title': 'off',
   'jest/prefer-spy-on': 'off',
   'jest/prefer-strict-equal': 'off',
-  'jest/prefer-to-be-null': 'off',
-  'jest/prefer-to-be-undefined': 'off',
   'jest/prefer-to-be': 'off',
   'jest/prefer-to-contain': 'warn',
   'jest/prefer-to-have-length': 'warn',
@@ -78,7 +73,7 @@ const rules = {
   'jest/require-to-throw-message': 'off',
   'jest/require-top-level-describe': 'off',
   'jest/unbound-method': 'off',
-  'jest/valid-describe': 'error',
+  'jest/valid-describe-callback': 'error',
   'jest/valid-expect': 'error',
   'jest/valid-expect-in-promise': 'error',
   'jest/valid-title': 'warn',
@@ -108,7 +103,7 @@ const rules = {
         'testing-library/no-await-sync-events': 'error',
         'testing-library/no-await-sync-query': 'error',
         'testing-library/no-container': 'error',
-        'testing-library/no-debug': 'error',
+        'testing-library/no-debugging-utils': 'error',
         'testing-library/no-dom-import': ['error', 'react'],
         'testing-library/no-manual-cleanup': 'error',
         'testing-library/no-node-access': 'error',