Bump twilio from 6.30.0 to 6.44.0

Bumps [twilio](https://github.com/twilio/twilio-python) from 6.30.0 to 6.44.0.
- [Release notes](https://github.com/twilio/twilio-python/releases)
- [Changelog](https://github.com/twilio/twilio-python/blob/master/CHANGES.md)
- [Commits](twilio/twilio-python@6.30.0...6.44.0)

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

requirements.txt

@@ -44,6 +44,6 @@ six==1.12.0
 soupsieve==1.9.3
 sqlparse==0.3.0
 toml==0.10.0
-twilio==6.30.0
+twilio==6.44.0
 urllib3==1.25.3
 whitenoise==4.1.3