add support pre Python 3.8

Signed-off-by: Paul Horton <[email protected]>

Author: madpah

cyclonedx/utils/conda.py

@@ -17,9 +17,15 @@
 # SPDX-License-Identifier: Apache-2.0
 # Copyright (c) OWASP Foundation. All Rights Reserved.
 import json
+import sys
 from json import JSONDecodeError
+from typing import Union
+
+if sys.version_info >= (3, 8, 0):
+    from typing import TypedDict
+else:
+    from typing_extensions import TypedDict
 
-from typing import TypedDict, Union
 from urllib.parse import urlparse
 
 

poetry.lock

@@ -41,8 +41,9 @@ python = "^3.6"
 packageurl-python = "^0.9.4"
 requirements_parser = "^0.2.0"
 setuptools = "^50.3.2"
-importlib-metadata = "^4.8.1"
+importlib-metadata = { version = "^4.8.1", python = "~3.6 | ~3.7" }
 toml = "^0.10.2"
+typing-extensions = { version = "^3.10.0", python = "~3.6 | ~3.7" }
 
 [tool.poetry.dev-dependencies]
 tox = "^3.24.3"