Merge pull request #1282 from gtk-rs/dependabot/cargo/serial_test-3.0.0

build(deps): bump serial_test from 2.0.0 to 3.0.0

Author: sdroege

Cargo.lock

@@ -54,4 +54,4 @@ smallvec = "1"
 futures = "0.3"
 futures-util = { version = "0.3", features = ["io"] }
 gir-format-check = "^0.1"
-serial_test = "2"
+serial_test = "3"