fix: re-render w/ useWhenProviderReady, add tests (#901)

This PR:

- brings react-sdk test coverage from 0% to ~95%
  - adds DOM-based testing (tests based on asserting DOM entity states)
    - tests for query-style, basic, and detailed evaluation APIs
- tests for suspense functionality and re-rendering on context change
  - tests for some util functions and hooks
  - `renderHook` tests for non suspending hooks
- fixes a bug where `useWhenProviderReady` didn't cause re-render after
the provider is ready if suspense wasn't used (leading to an out-of-date
return value for provider readiness)


![image](https://github.com/open-feature/js-sdk/assets/25272906/e8ee420f-0167-4048-94e3-53176bd883b9)

---------

Signed-off-by: Todd Baert <[email protected]>

jest.config.ts

@@ -171,6 +171,24 @@ export default {
         ],
       },
     },
+    {
+      displayName: 'react',
+      testEnvironment: 'jsdom',
+      preset: 'ts-jest',
+      testMatch: ['<rootDir>/packages/react/test/**/*.spec.ts*'],
+      moduleNameMapper: {
+        '@openfeature/core': '<rootDir>/packages/shared/src',
+        '@openfeature/web-sdk': '<rootDir>/packages/client/src',
+      },
+      transform: {
+        '^.+\\.tsx$': [
+          'ts-jest',
+          {
+            tsconfig: '<rootDir>/packages/react/test/tsconfig.json',
+          },
+        ],
+      },
+    },
   ],
 
   // Use this configuration option to add custom reporters to Jest