Update setup.py requirements

Author: python273

setup.py

@@ -38,7 +38,11 @@
     license='Apache License, Version 2.0, see LICENSE file',
 
     packages=['vk_api', 'jconfig'],
-    install_requires=['requests', 'enum34', 'beautifulsoup4', 'six'],
+    install_requires=['requests', 'enum34', 'six'],
+    extras_require={
+        'vkstreaming': ['websocket-client'],
+        'vkaudio': ['beautifulsoup4'],
+    },
 
     classifiers=[
         'License :: OSI Approved :: Apache Software License',