Switched from github link to crate version

Author: LucaCappelletti94

Cargo.toml

@@ -22,7 +22,7 @@ serde = { version = "1.0", features = ["derive"], optional = true}
 digest = { package = "digest", version = "0.8", default-features = false, optional = true  }
 digest_0_9 = { package = "digest", version = "0.9", default-features = false, optional = true }
 digest_0_10 = { package = "digest", version = "0.10", default-features = false, optional = true }
-mem_dbg = {git="https://github.com/LucaCappelletti94/mem_dbg-rs", optional = true, branch="alloc"}
+mem_dbg = {version = "0.2.4", optional=true}
 
 [dev-dependencies]
 serde_json = "1.0"