cargo sort for stm dependencies

Author: iquerejeta

mithril-stm/Cargo.toml

@@ -26,12 +26,12 @@ digest      = { version = "0.10.5", features = ["alloc"] }
 num-bigint  = { version = "0.4.0", optional = true }
 num-rational = { version = "0.4.0", optional = true }
 num-traits  = { version = "0.2.14", optional = true }
+rand = "0.6.1"
 rand_core   = "0.6.3"
 rayon       = "1.5.1"
 rug = { version = "1.14", optional = true }
 serde = { version = "1", features = ["rc", "derive"] }
 thiserror = "1.0"
-rand = "0.6.1"
 
 [dev-dependencies]
 bincode = "1.3.3"