Bump pgproto version (fixes relative imports)

1st1 · 1st1 · commit ba5abdd73374 · 2018-10-04T13:44:55.000-04:00
diff --git a/asyncpg/pgproto b/asyncpg/pgproto
@@ -1 +1 @@
-Subproject commit e26b45bbc4f5e3195ec0b86ac4ed4ec5a429e94d
+Subproject commit 3f9a5068617423a54c7c9ab772b54ce51dfab218
