Update otr dependency for mac

Author: adigeo

mac/sipsimple-requirements.txt

@@ -1,5 +1,5 @@
 python3-eventlib @ https://github.com/AGProjects/python3-eventlib/archive/refs/tags/0.3.0.tar.gz
 python3-gnutls @ https://github.com/AGProjects/python3-gnutls/archive/refs/tags/release-3.1.10.tar.gz
-python3-otr @ https://github.com/AGProjects/python3-otr/archive/refs/tags/2.0.2.tar.gz
+python3-otr @ https://github.com/AGProjects/python3-otr/archive/refs/tags/2.1.0.tar.gz
 python3-xcaplib @ https://github.com/AGProjects/python3-xcaplib/archive/refs/tags/2.0.1.tar.gz
 python3-msrplib @ https://github.com/AGProjects/python3-msrplib/archive/refs/tags/0.21.0.tar.gz