Cargo.toml: added prettytable-rs

Cargo.toml

@@ -33,6 +33,7 @@ bitvec = "0.18"
 bimap = "0.5.2"
 hex = "0.4.2"
 bs58 = "0.4.0"
+prettytable-rs = "0.8"
 
 smol = "1.2.4"
 futures = "0.3.17"