Add safe_map generator

Author: Maria-12648430

lib/common_test/src/ct_property_test_proper_ext.erl

@@ -24,13 +24,19 @@
 -export([safe_any/0]).
 -export([safe_atom/0]).
 -export([safe_list/0]).
+-export([safe_map/0]).
 -export([safe_tuple/0]).
 
 -spec safe_list() -> proper_types:type().
 safe_list() ->
     proper_types:list(safe_any()).
 
 
+-spec safe_map() -> proper_types:type().
+safe_map() ->
+    proper_types:map(safe_any(), safe_any()).
+
+
 -spec safe_tuple() -> proper_types:type().
 safe_tuple() ->
     proper_types:tuple(safe_any()).