Enable jest/consistent-test-it rule (as a warning) (facebook#37962)

Summary:
X-link: facebook/metro#1008

Pull Request resolved: facebook#37962

Changelog: [Internal]

Reviewed By: robhogan, huntie

Differential Revision: D46838228

fbshipit-source-id: c0699b852897353fb3c92f8eade256effa4f4696

.eslintrc.js

@@ -18,7 +18,7 @@ module.exports = {
 
   extends: ['@react-native'],
 
-  plugins: ['@react-native/eslint-plugin-specs', 'lint'],
+  plugins: ['@react-native/eslint-plugin-specs', 'jest', 'lint'],
 
   overrides: [
     // overriding the JS config from @react-native/eslint-config to ensure
@@ -70,6 +70,12 @@ module.exports = {
         expect: true,
         jest: true,
       },
+      rules: {
+        'jest/consistent-test-it': [
+          'warn',
+          {fn: 'test', withinDescribe: 'test'},
+        ],
+      },
     },
     {
       files: ['**/__tests__/**/*-test.js'],