deps: bump github.com/go-kit/kit from 0.6.0 to 0.9.0 (#3952)

Bumps [github.com/go-kit/kit](https://github.com/go-kit/kit) from 0.6.0 to 0.9.0.
- [Release notes](https://github.com/go-kit/kit/releases)
- [Commits](https://github.com/go-kit/kit/compare/v0.6.0...v0.9.0)

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

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/btcsuite/btcd v0.0.0-20190115013929-ed77733ec07d
 	github.com/btcsuite/btcutil v0.0.0-20180706230648-ab6388e0c60a
 	github.com/fortytw2/leaktest v1.3.0
-	github.com/go-kit/kit v0.8.0
+	github.com/go-kit/kit v0.9.0
 	github.com/go-logfmt/logfmt v0.4.0
 	github.com/gogo/protobuf v1.3.0
 	github.com/golang/protobuf v1.3.2

go.sum

@@ -44,6 +44,8 @@ github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMo
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/go-kit/kit v0.8.0 h1:Wz+5lgoB0kkuqLEc6NVmwRknTKP6dTGbSqvhZtBI/j0=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
+github.com/go-kit/kit v0.9.0 h1:wDJmvq38kDhkVxi50ni9ykkdUr1PKgqKOoi01fa0Mdk=
+github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0 h1:8HUsc87TaSWLKwrnumgC8/YconD2fJQsRJAsWaPg2ic=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
 github.com/go-logfmt/logfmt v0.4.0 h1:MP4Eh7ZCb31lleYCFuwm0oe4/YGak+5l1vA2NOE80nA=