Revert "Bump requests from 2.12.4 to 2.20.0 (#373)" (#378)
Revert "Bump requests from 2.12.4 to 2.20.0 (#373)" (#378)

This reverts commit 04ea6ad7ed37dd1110a37c97e42fdd371f5ef709.
Cal-CS-61A-Staff/ok-client