README.md: Now there is one branch for all PG versions

Author: CherkashinSergey

README.md

@@ -12,15 +12,8 @@ Using this module there can help in the following things:
  - overwatch the query execution
 
 ## Installation
-To install `pg_query_state`, please apply patches `custom_signal.patch` and `runtime_explain.patch` to the latest stable version of PostgreSQL and rebuild PostgreSQL.
+To install `pg_query_state`, please apply corresponding patches `custom_signal_(PG_VERSION).patch` and `runtime_explain.patch` (or `runtime_explain_11.0.patch` for PG11) to reqired stable version of PostgreSQL and rebuild PostgreSQL.
 
-Correspondence branch names to PostgreSQL version numbers:
-- _PG9_5_    --- PostgreSQL 9.5
-- _PGPRO9_5_ --- PostgresPro 9.5
-- _PGPRO9_6_ --- PostgreSQL 9.6 and PostgresPro 9.6
-- _PGPRO10_  --- PostgresPro 10
-- _PG10_     --- PostgreSQL 10
-- _master_   --- development version for the newest version PostgreSQL
 
 Then execute this in the module's directory:
 ```