The From<u32> implementation for Bson performs a simple cast to i32, which will overflow and return negative numbers for large u32 values. This is also true for the From<u64> implementation. We should fix the u32 one to convert to an i64 as necessary and perhaps remove the u64 one altogether, as we cannot guarantee it will convert losslessly.

Acceptance Criteria

• Fix the u32 by casting to i64 when needed.
• Since there is no i128, we can't fix u64 in the same way, so we should remove it since it is data lossy.
• Add in a try block for the u64 case.

Open Questions

• How do we handle the backport? Is panicking a sensible option? Is deprecation the right option? 
  • Could panic safely if we also add the dep warning.