Update dependency twilio to v6.44.1 (#260)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

requirements.txt

@@ -9,7 +9,7 @@ celery==4.4.5
 redis==3.5.3
 cryptography==2.9.2
 markdown2==2.3.9
-twilio==6.44.0
+twilio==6.44.1
 pyumetric==0.0.4
 pyvalitron==1.1.3
 feedgen==0.9.0