chore: prevent normalization of semver versioning (#22)

* chore: prevent normalization of semver versioning

* chore: update workaround to make sic work

Author: dandhlee

setup.py

@@ -20,6 +20,21 @@
 
 import setuptools  # type: ignore
 
+# Disable version normalization performed by setuptools.setup()
+try:
+    # Try the approach of using sic(), added in setuptools 46.1.0
+    from setuptools import sic
+except ImportError:
+    # Try the approach of replacing packaging.version.Version
+    sic = lambda v: v
+    try:
+        # setuptools >=39.0.0 uses packaging from setuptools.extern
+        from setuptools.extern import packaging
+    except ImportError:
+        # setuptools <39.0.0 uses packaging from pkg_resources.extern
+        from pkg_resources.extern import packaging
+    packaging.version.Version = packaging.version.LegacyVersion
+
 version = "0.1.1"
 
 package_root = os.path.abspath(os.path.dirname(__file__))
@@ -31,7 +46,7 @@
 
 setuptools.setup(
     name="google-cloud-binary-authorization",
-    version=version,
+    version=sic(version),
     long_description=readme,
     author="Google LLC",
     author_email="googleapis-packages@google.com",