Add known class type

Author: TheElementalOfDestruction

extract_msg/constants/__init__.py

@@ -222,6 +222,7 @@
     'ipm.report',
     'ipm.resend',
     'ipm.schedule',
+    'ipm.skypeteams.message'
     'ipm.task',
     'ipm.taskrequest',
     'report',
@@ -291,4 +292,4 @@
     0x1102: 'PtypMultipleBinary',
 }
 
-# END CONSTANTS.
+# END CONSTANTS.