Fix shiny run cli command (introduced by #69)

cpsievert · cpsievert · commit a6a0fa862fe2 · 2022-02-10T14:37:46.000-06:00
diff --git a/setup.cfg b/setup.cfg
@@ -20,4 +20,4 @@ exclude = docs
 
 [options.entry_points]
 console_scripts =
-    shiny = shiny.main:main
+    shiny = shiny._main:main
