GitHub Copilot gets major update with OpenAI's GPT-4 model and new features

GitHub has released an update to its Copilot platform, introducing new features such as chat and voice interfaces, support for pull requests, and the ability to answer questions on documentation. The update also adopts OpenAI's GPT-4 model for a more personalized developer experience. Additional features include chat interfaces in the editor that can generate code, explain code blocks, generate tests, and fix bugs, as well as a voice-to-code extension that can take natural language prompts from developers. GitHub Copilot for PRs is also included, enabling developers to generate descriptions and tags for pull requests based on the changed code, and warning them about insufficient testing and suggesting potential tests.