Update with categories and exclude section

Cargo.toml

@@ -7,7 +7,9 @@ description = "A simple BST implementation within Rust"
 license = "MIT"
 readme = "README.md"
 repository = "https://github.com/sgoudham/bst-rs"
-keywords = ["bst", "algorithms", "data-structures", "structure", "tree"]
+keywords = ["bst", "algorithms", "data-structures", "tree", "binary-search-tree"]
+categories = ["data-structures", ]
+exclude = ["scripts/**", ".github/**"]
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html