[Bug] Fix error when loading a mocked stream when dependencies are no…

…t available (#8)

* Update pyproject.toml

* Update _not_implemented.py

Fix issue in setting static var for a dynamic class

iotoolz/extensions/_not_implemented.py

@@ -8,8 +8,6 @@ def mock_stream(supported_schemas: Set[str], msg: str) -> Type[AbcStream]:
     class NotImplementedStream(AbcStream):
         """NotImplementedStream is a mock stream interface for extension streams that does not have the required dependencies installed."""
 
-        supported_schemas = supported_schemas
-
         def __init__(self, *args, **kwargs):  # pylint: disable=super-init-not-called
             raise NotImplementedError(msg)
 
@@ -23,4 +21,6 @@ def write_from_fileobj_(
         ) -> StreamInfo:
             raise NotImplementedError(msg)
 
+    NotImplementedStream.supported_schemas = supported_schemas
+
     return NotImplementedStream

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "iotoolz"
-version = "0.1.0-rc-4"
+version = "0.1.0-rc-5"
 description = "Consistent io iterface to read and write from/to both local and different remote resources (e.g. http, s3)"
 keywords = ["io", "stream", "requests", "ftp", "s3"]
 authors = ["eterna2 <eterna2@hotmail.com>"]