Better Py2 compatibility for V2

Author: tcalmant

javaobj/v2/main.py

@@ -3,9 +3,15 @@
 Mimics the core API with the new deserializer
 """
 
-from io import BytesIO
 from typing import Any, IO, Iterable
 
+try:
+    # Python 2
+    from StringIO import StringIO as BytesIO
+except ImportError:
+    # Python 3+
+    from io import BytesIO
+
 from .api import ObjectTransformer
 from .core import JavaStreamParser
 from .transformers import DefaultObjectTransformer, NumpyArrayTransformer