Add the optional compression libs to extras_require (dpkp#2123)

Author: jeffwidman

setup.py

@@ -36,7 +36,12 @@ def run(cls):
     version=__version__,
 
     tests_require=test_require,
-    extras_require={"crc32c": ["crc32c"]},
+    extras_require={
+        "crc32c": ["crc32c"],
+        "lz4": ["lz4"],
+        "snappy": ["python-snappy"],
+        "zstd": ["python-zstandard"],
+    },
     cmdclass={"test": Tox},
     packages=find_packages(exclude=['test']),
     author="Dana Powers",