Make python examples 3.6 compatible

Author: Kyrylo

examples/python/snippets/barcode/detect_barcodes.py

@@ -1,4 +1,6 @@
 from scanbotsdk import *
+from typing import List
+
 
 def scan_barcode(image: ImageRef):
     configuration = BarcodeScannerConfiguration(
@@ -16,7 +18,7 @@ def scan_barcode(image: ImageRef):
     print_barcodes(result.barcodes)
 
 
-def print_barcodes(barcodes: list[BarcodeItem]):
+def print_barcodes(barcodes: List[BarcodeItem]):
     if not barcodes:
         print("No barcodes found")
         return

examples/python/snippets/document/crop_and_analyze.py

@@ -1,8 +1,10 @@
 import os
 from scanbotsdk import *
 from utils import create_image_ref
+from typing import Optional
 
-def crop_and_analyze(image_path: str, save_path: str | None = None):
+
+def crop_and_analyze(image_path: str, save_path: Optional[str] = None):
     with create_image_ref(image_path) as image:
         # Configure scanner
         config = DocumentScannerConfiguration()