Update CHANGELOG.md for sentinel/v0.13.0
Update CHANGELOG.md for sentinel/v0.13.0

hashicorp/consul,42wim/consul,scalp42/consul,42wim/consul,42wim/consul,scalp42/consul,hashicorp/consul,scalp42/consul,42wim/consul,42wim/consul,scalp42/consul,scalp42/consul,kingland/consul,hashicorp/consul,kingland/consul,kingland/consul,kingland/consul,hashicorp/consul,kingland/consul