Streaming support for Test and Chat completion Also included minor text changes

What's Changed

• Streaming support by @n3bul4 in https://github.com/TheoKanning/openai-java/pull/195
• Add streaming tests by @TheoKanning in https://github.com/TheoKanning/openai-java/pull/225
• Add gpt-4 and FAQ to readme by @TheoKanning in https://github.com/TheoKanning/openai-java/pull/226
• Remove references to specific GPT models by @TheoKanning in https://github.com/TheoKanning/openai-java/pull/227
• Update version to 0.12.0 by @TheoKanning in https://github.com/TheoKanning/openai-java/pull/228

New Contributors

• @n3bul4 made their first contribution in https://github.com/TheoKanning/openai-java/pull/195

Full Changelog: https://github.com/TheoKanning/openai-java/compare/0.11.1...0.12.0