chore: Update setup with v1.0.0 version and new support

Author: Cobertos

setup.py

@@ -2,7 +2,7 @@
 
 setup(
     name='unitypackage_extractor',
-    version='0.5.1',
+    version='1.0.0',
     description='Extractor for .unitypackage files',
     long_description=open('README.md', 'r').read(),
     long_description_content_type="text/markdown",
@@ -16,6 +16,7 @@
         'License :: OSI Approved :: MIT License',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
         'Topic :: Software Development :: Build Tools',
         'Topic :: System :: Filesystems'
     ],