validation passed to the canvas library now compiled

canvas/Cargo.toml

@@ -23,6 +23,7 @@ thiserror = { workspace = true }
 tracing = "0.1.41"
 tracing-subscriber = "0.3.19"
 async-trait.workspace = true
+regex = { workspace = true, optional = true }
 
 [dev-dependencies]
 tokio-test = "0.4.4"
@@ -32,6 +33,8 @@ default = []
 gui = ["ratatui"]
 autocomplete = ["tokio"]
 cursor-style = ["crossterm"]
+regex = ["dep:regex"]
+validation = ["regex"]
 
 [[example]]
 name = "autocomplete"