Update http status codes to retry request on

[justinpolygon]

Fixes #525.

If this update makes sense we should probably update the other client libraries with similar logic. Happy to have feedback here on if this PR makes sense.

Updated the existing retry logic by adding more HTTP status codes that should trigger a request retry. The default urllib3 status codes to retry on are 413, 429, 503. In this update, HTTP status codes to retry on has been updated to 413, 429, 500, 502, 503, 504 via the status_forcelist in the retry strategy, to accommodate a larger spectrum of server and client errors, especially those pertaining to temporary gateway or server issues.

Default status codes to retry on:

• 413: Request Entity Too Large
• 429: Too Many Requests
• 503: Service Unavailable

Added these status codes:

• 500: Internal Server Error
• 502: Bad Gateway
• 504: Gateway Timeout

Additionally, the backoff_factor was modified to 0.1 to facilitate a gradual backoff between retries using 0.0s, 0.2s, 0.4s, 0.8s, 1.6s, .... These modifications aim to improve the client retry logic against transient server problems and reliability of the client's HTTP requests in various situations.