Add async-class to package catalog

all_pkgs_stb.json

@@ -16,6 +16,7 @@
         "ascii": "ascii",
         "asks": "asks",
         "astropy": "astropy",
+        "async-class": "async_class",
         "async-generator": "async_generator",
         "async-port-scanner": "async_port_scanner",
         "async-timeout": "async_timeout",