cargo.toml: add license

Author: Mic92

Cargo.toml

@@ -5,6 +5,7 @@ version = "1.1.0"
 authors = ["Jörg Thalheim <[email protected]>"]
 categories = ["tools::Debugging", "systems::Unix APIs"]
 repository = "https://github.com/Mic92/cntr"
+license = "MIT"
 
 [dependencies]
 cpuprofiler = {version = "*", optional = true}