[NEW] www/py-webargs: Python library for parsing and validating HTTP request objects

webargs is a Python library for parsing and validating HTTP request
objects, with built-in support for popular web frameworks, including
Flask, Django, Bottle, Tornado, Pyramid, webapp2, Falcon, and aiohttp

WWW: https://github.com/marshmallow-code/webargs

PR: 242610
Submitted by: Goran Mekić <mekaat tilda center>