add description & license

Author: NyxCode

Cargo.toml

@@ -3,6 +3,8 @@ name = "proxy-enum"
 version = "0.1.1"
 authors = ["Moritz Bischof <moritz.bischof@aleph-alpha.de>"]
 edition = "2018"
+description = "Emulate dynamic dispatch and sealed classes using a proxy enum, which defers all method calls to its variants."
+license = "MIT"
 
 [lib]
 proc-macro = true