:lock: Bump twisted version to `20.3.0` (#2135)
:lock: Bump twisted version to `20.3.0` (#2135)

Because of a detected vulnerability with prior versions of twisted:

**See also**: https://github.com/advisories/GHSA-h96w-mmrf-2h6v
kronenpj/python-for-android,PKRoma/python-for-android,kivy/python-for-android,PKRoma/python-for-android,kronenpj/python-for-android,PKRoma/python-for-android,germn/python-for-android,rnixx/python-for-android,kivy/python-for-android,rnixx/python-for-android,kronenpj/python-for-android,rnixx/python-for-android,rnixx/python-for-android,germn/python-for-android,kronenpj/python-for-android,kivy/python-for-android,rnixx/python-for-android,PKRoma/python-for-android,kronenpj/python-for-android,germn/python-for-android,kivy/python-for-android,germn/python-for-android,germn/python-for-android,rnixx/python-for-android,germn/python-for-android,PKRoma/python-for-android,kivy/python-for-android