#135: added support for lists in map

Author: jorre127

example/lib/model/ogm.dart

@@ -30,6 +30,7 @@ OGM:
       type: List<List<Testing>>?
     simpleFields: List<Testing>
     simpleMap: Map<String, Testing>?
+    listMap: Map<Int, List<String>>
 
 Testing:
   path: user

example/lib/model/ogm.g.dart

@@ -372,7 +372,7 @@ class YmlGeneratorConfig {
   ItemType _parseSimpleType(String type) {
     final listRegex = RegExp(r'^\s*[Ll]ist<\s*([a-zA-Z_0-9<>]*)\s*>\s*$');
     final mapRegex =
-        RegExp(r'^\s*[Mm]ap<([a-zA-Z_0-9]*)\s*,\s*([a-zA-Z_0-9]*)\s*>\s*$');
+        RegExp(r'^\s*[Mm]ap<([a-zA-Z_0-9<>]*)\s*,\s*([a-zA-Z_0-9<>]*)\s*>\s*$');
 
     final lowerType = type.toLowerCase();