Correctly update silentdragonlite-cli dependency

lib/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "qtlib"
 version = "0.1.0"
-authors = ["zecwallet"]
+authors = ["zecwallet", "The Hush Developers"]
 edition = "2018"
 
 [lib]
@@ -12,4 +12,4 @@ crate-type = ["staticlib"]
 libc = "0.2.58"
 lazy_static = "1.4.0"
 blake3 = "0.3.4"
-silentdragonlitelib = { git = "https://git.hush.is/hush/silentdragonlite-cli", rev = "307f4370ea8e638864920159f4ce9e89e338f243" }
+silentdragonlitelib = { git = "https://git.hush.is/hush/silentdragonlite-cli", rev = "684f2d8bb344cedf0382ed48c551897961217694" }