build: only include src/ dir to reduce crate size

Author: mds1

Diff for: Cargo.toml

@@ -7,6 +7,7 @@
   name = "scopelint"
   repository = "https://github.com/ScopeLift/scopelint"
   version = "0.0.16"
+  include = ["/src"]
 
 [dependencies]
   clap = { version = "4.1.8", features = ["derive"] }