3.7 fix

setup.py

@@ -17,7 +17,12 @@ def readme():
     author_email="[email protected]",
     url="https://github.com/7x11x13/soundcloud.py",
     packages=["soundcloud", "soundcloud.resource"],
-    install_requires=["dacite", "python-dateutil>=2.8.2", "requests"],
+    install_requires=[
+        "dacite",
+        "python-dateutil>=2.8.2",
+        "requests",
+        "typing-extensions; python_version < '3.8'",
+    ],
     extras_require={"test": ["coveralls", "pytest", "pytest-dotenv"], "docs": ["pdoc"]},
     classifiers=[
         "Programming Language :: Python :: 3.7",

soundcloud/resource/graphql.py

@@ -1,5 +1,10 @@
 from dataclasses import dataclass
-from typing import List, Literal, Optional
+from typing import List, Optional
+
+try:
+    from typing import Literal
+except ImportError:
+    from typing_extensions import Literal
 
 from soundcloud.resource.base import BaseData
 from soundcloud.resource.comment import BasicComment