Update readme in regards to Postgres versions needed

PJMODOS · PJMODOS · commit a65d79261106 · 2015-12-27T19:18:36.000+01:00
diff --git a/README.md b/README.md
@@ -12,7 +12,7 @@ reused from the earlier Slony technology:
 
 pglogical is new technology utilising the latest in-core features, so we have these version restrictions:
 * Provider & subscriber nodes must run PostgreSQL 9.4+
-* PostgreSQL 9.5+ is required for replication origin filtering
+* PostgreSQL 9.5+ is required for replication origin filtering and conflict detection
 
 Use cases supported are:
 * Upgrades between major versions (given the above restrictions)
