Bump pgproto to the latest

1st1 · 1st1 · commit 366f07262dd1 · 2019-11-19T15:42:00.000-05:00
diff --git a/asyncpg/pgproto b/asyncpg/pgproto
@@ -1 +1 @@
-Subproject commit c64912370b8532df7a561389f139f838b3681670
+Subproject commit 4de72c5de696e5892a4209d94b9e3af0043ca7d5
