[#629] go.mod/base58: Bump version

- github.com/mr-tron/base58 v1.1.3 => v1.2.0

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/hashicorp/golang-lru v0.5.4
 	github.com/klauspost/compress v1.11.3
 	github.com/mitchellh/go-homedir v1.1.0
-	github.com/mr-tron/base58 v1.1.3
+	github.com/mr-tron/base58 v1.2.0
 	github.com/multiformats/go-multiaddr v0.3.2
 	github.com/nspcc-dev/hrw v1.0.9
 	github.com/nspcc-dev/neo-go v0.95.2