Bump github.com/mr-tron/base58 from 1.1.3 to 1.2.0

Bumps [github.com/mr-tron/base58](https://github.com/mr-tron/base58) from 1.1.3 to 1.2.0.
- [Release notes](https://github.com/mr-tron/base58/releases)
- [Commits](mr-tron/base58@v1.1.3...v1.2.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

go.mod

@@ -33,7 +33,7 @@ require (
 	github.com/imdario/mergo v0.3.7 // indirect
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/morikuni/aec v1.0.0 // indirect
-	github.com/mr-tron/base58 v1.1.3
+	github.com/mr-tron/base58 v1.2.0
 	github.com/mwitkow/go-proto-validators v0.0.0-20190212092829-1f388280e944 // indirect
 	github.com/onsi/ginkgo v1.8.0 // indirect
 	github.com/opencontainers/go-digest v1.0.0-rc1 // indirect

go.sum

@@ -377,6 +377,8 @@ github.com/morikuni/aec v1.0.0 h1:nP9CBfwrvYnBRgY6qfDQkygYDmYwOilePFkwzv4dU8A=
 github.com/morikuni/aec v1.0.0/go.mod h1:BbKIizmSmc5MMPqRYbxO4ZU0S0+P200+tUnFx7PXmsc=
 github.com/mr-tron/base58 v1.1.3 h1:v+sk57XuaCKGXpWtVBX8YJzO7hMGx4Aajh4TQbdEFdc=
 github.com/mr-tron/base58 v1.1.3/go.mod h1:BinMc/sQntlIE1frQmRFPUoPA1Zkr8VRgBdjWI2mNwc=
+github.com/mr-tron/base58 v1.2.0 h1:T/HDJBh4ZCPbU39/+c3rRvE0uKBQlU27+QI8LJ4t64o=
+github.com/mr-tron/base58 v1.2.0/go.mod h1:BinMc/sQntlIE1frQmRFPUoPA1Zkr8VRgBdjWI2mNwc=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/mwitkow/go-proto-validators v0.0.0-20180403085117-0950a7990007/go.mod h1:m2XC9Qq0AlmmVksL6FktJCdTYyLk7V3fKyp0sl1yWQo=
 github.com/mwitkow/go-proto-validators v0.0.0-20190212092829-1f388280e944 h1:RY9I2vt95pyT12MKfJo1Ck3O+NPQqlukBahURwDtJBc=