Update http.py for 2.x support

[nxfi777]

Thank you for submitting this pull request! We appreciate you spending the time to work on these changes.

What is the motivation?

2.x HTTP support

Type of Change

• 📚 Examples / docs / tutorials / dependencies update
• 🔧 Bug fix (non-breaking change which fixes an issue)
• 🥂 Improvement (non-breaking change which improves an existing feature)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🔐 Security fix

What does this change do?

Allows choosing version number in the SurrealHTTP class and sets appropriate headers

What is your testing strategy?

Tested by importing the class directly into my own environment

Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines