Update setup.py to install zstandard instead of python-zstandard (dpkp#2387)

Closes dpkp#2350, since it's a valid security concern.

Author: wbarnha

setup.py

@@ -40,7 +40,7 @@ def run(cls):
         "crc32c": ["crc32c"],
         "lz4": ["lz4"],
         "snappy": ["python-snappy"],
-        "zstd": ["python-zstandard"],
+        "zstd": ["zstandard"],
     },
     cmdclass={"test": Tox},
     packages=find_packages(exclude=['test']),