Add math lib and correctly use python funcs

Author: PineappleIOnic

templates/dart/lib/package.dart.twig

@@ -6,6 +6,7 @@
 library {{ language.params.packageName }};
 
 import 'dart:async';
+import 'dart:math';
 import 'dart:typed_data';
 
 import 'src/enums.dart';

templates/flutter/lib/package.dart.twig

@@ -6,6 +6,7 @@
 library {{ language.params.packageName }};
 
 import 'dart:async';
+import 'dart:math';
 import 'dart:typed_data';
 import 'src/enums.dart';
 import 'src/service.dart';

templates/python/package/id.py.twig

@@ -16,6 +16,6 @@ class ID:
 
     @staticmethod
     def unique(padding = 5):
-        base_id = uniqid()
+        base_id = ID.uniqid()
         random_padding = ''.join(random.choice('0123456789abcdef') for _ in range(padding))
         return base_id + random_padding