Update Pillow and Twisted versions (#821)
Update Pillow and Twisted versions (#821)

This is to fix a few security vulnerabilities:
 * CVE-2019-19911
 * CVE-2020-5313
 * CVE-2020-10108
 * CVE-2020-10109
pajlada/pajbot,pajlada/tyggbot,pajlada/pajbot,pajlada/pajbot,pajlada/tyggbot,pajlada/tyggbot,pajlada/tyggbot,pajlada/pajbot