Mention PostgreSQL 11 support in the documentation.

elprans · elprans · commit e8120c504c22 · 2018-10-30T23:26:24.000-04:00
diff --git a/docs/index.rst b/docs/index.rst
@@ -15,7 +15,7 @@ of PostgreSQL server binary protocol for use with Python's ``asyncio``
 framework.
 
 **asyncpg** requires Python 3.5 or later and is supported for PostgreSQL
-versions 9.2 to 10.
+versions 9.2 to 11.
 
 Contents
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