Bump github.com/sirupsen/logrus from 1.7.0 to 1.8.1

Bumps [github.com/sirupsen/logrus](https://github.com/sirupsen/logrus) from 1.7.0 to 1.8.1.
- [Release notes](https://github.com/sirupsen/logrus/releases)
- [Changelog](https://github.com/sirupsen/logrus/blob/master/CHANGELOG.md)
- [Commits](sirupsen/logrus@v1.7.0...v1.8.1)

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

go.mod

@@ -13,7 +13,7 @@ require (
 	github.com/kz/discordrus v1.2.0
 	github.com/opentracing/opentracing-go v1.2.0
 	github.com/prometheus/client_golang v1.9.0
-	github.com/sirupsen/logrus v1.7.0
+	github.com/sirupsen/logrus v1.8.1
 	github.com/uber/jaeger-client-go v2.25.0+incompatible
 	github.com/uber/jaeger-lib v2.4.0+incompatible
 	go.uber.org/atomic v1.7.0 // indirect

go.sum

@@ -285,6 +285,7 @@ github.com/sirupsen/logrus v1.6.0 h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I
 github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
 github.com/sirupsen/logrus v1.7.0 h1:ShrD1U9pZB12TX0cVy0DtePoCH97K8EtX+mg7ZARUtM=
 github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
+github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
 github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
 github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=