new version, also announcing windows compatibility to pypi (#303)

Author: wilko77

setup.py

@@ -55,7 +55,7 @@
 
 setup(
     name="anonlink",
-    version='0.13.0-dev',
+    version='0.13.0',
     description='Anonymous linkage using cryptographic hashes and bloom filters',
     long_description=readme,
     long_description_content_type='text/x-rst',
@@ -83,6 +83,7 @@
         "Operating System :: MacOS :: MacOS X",
         "Operating System :: POSIX",
         "Operating System :: POSIX :: Linux",
+        "Operating System :: Microsoft :: Windows",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",