Bump github.com/alecthomas/kong from 0.7.1 to 0.8.0 (percona#681)

Bumps [github.com/alecthomas/kong](https://github.com/alecthomas/kong) from 0.7.1 to 0.8.0.
- [Commits](alecthomas/kong@v0.7.1...v0.8.0)

---
updated-dependencies:
- dependency-name: github.com/alecthomas/kong
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -9,7 +9,7 @@ replace github.com/prometheus/client_golang v1.12.2 => github.com/Percona-Lab/cl
 
 require (
 	github.com/AlekSi/pointer v1.1.0
-	github.com/alecthomas/kong v0.7.1
+	github.com/alecthomas/kong v0.8.0
 	github.com/golang/snappy v0.0.3 // indirect
 	github.com/percona/exporter_shared v0.7.4-0.20211108113423-8555cdbac68b
 	github.com/pkg/errors v0.9.1

go.sum

@@ -38,8 +38,8 @@ github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym
 github.com/Percona-Lab/client_golang v1.12.2-0.20220701073455-ee06569fd6a5 h1:lDRQDHeClQgTRzllGb2R9SSqF/Y9EDtutT5EXDDdyZ4=
 github.com/Percona-Lab/client_golang v1.12.2-0.20220701073455-ee06569fd6a5/go.mod h1:obkGjwg6Wf+MW4GSHajtE/Krl1VzvajWi2ruzjqNk1k=
 github.com/alecthomas/assert/v2 v2.1.0 h1:tbredtNcQnoSd3QBhQWI7QZ3XHOVkw1Moklp2ojoH/0=
-github.com/alecthomas/kong v0.7.1 h1:azoTh0IOfwlAX3qN9sHWTxACE2oV8Bg2gAwBsMwDQY4=
-github.com/alecthomas/kong v0.7.1/go.mod h1:n1iCIO2xS46oE8ZfYCNDqdR0b0wZNrXAIAqro/2132U=
+github.com/alecthomas/kong v0.8.0 h1:ryDCzutfIqJPnNn0omnrgHLbAggDQM2VWHikE1xqK7s=
+github.com/alecthomas/kong v0.8.0/go.mod h1:n1iCIO2xS46oE8ZfYCNDqdR0b0wZNrXAIAqro/2132U=
 github.com/alecthomas/repr v0.1.0 h1:ENn2e1+J3k09gyj2shc0dHr/yjaWSHRlrJ4DPMevDqE=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=