Update tqdm requirement from ~=4.48.2 to ~=4.50.0 (#636)

Updates the requirements on [tqdm](https://github.com/tqdm/tqdm) to permit the latest version.
- [Release notes](https://github.com/tqdm/tqdm/releases)
- [Commits](tqdm/tqdm@v4.48.2...v4.50.0)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -13,5 +13,5 @@ sentry-sdk ~=0.17.2
 requests ~=2.24.0
 toolz ~=0.11.1
 tornado ~=6.0.4
-tqdm ~=4.48.2
+tqdm ~=4.50.0
 wayback ~=0.2.4