Remove [target.'cfg(debug_assertions)'.dependencies] in contrib Cargo.toml.

This is not supported and is the same as putting the contents in
[dependencies] anyway. It became a warning in rust-lang/cargo#7660.

Author: jebrosen

contrib/lib/Cargo.toml

@@ -56,6 +56,7 @@ rmp-serde = { version = "^0.13", optional = true }
 handlebars = { version = "2.0", optional = true }
 glob = { version = "0.3", optional = true }
 tera = { version = "0.11", optional = true }
+notify = { version = "4.0.6" }
 
 # UUID dependencies.
 uuid = { version = ">=0.7.0, <0.9.0", optional = true }
@@ -85,9 +86,6 @@ time = { version = "0.1.40", optional = true }
 brotli = { version = "3.3", optional = true }
 flate2 = { version = "1.0", optional = true }
 
-[target.'cfg(debug_assertions)'.dependencies]
-notify = { version = "^4.0.6" }
-
 [dev-dependencies]
 tokio = { version = "0.2.0", features = ["time"] }