Update top-crates to Cargo 0.68

Author: shepmaster

top-crates/Cargo.lock

@@ -9,7 +9,7 @@ license = "MIT OR Apache-2.0"
 repository = "https://github.com/integer32llc/rust-playground"
 
 [dependencies]
-cargo = "0.67.0"
+cargo = "0.68.0"
 itertools = "0.10.0"
 reqwest = { version = "0.11.0", features = ["blocking"] }
 semver = { version = "1.0.11", features = ["serde"] }