chore(deps): bump github.com/pkg/errors from 0.8.1 to 0.9.1 (#116)

Bumps [github.com/pkg/errors](https://github.com/pkg/errors) from 0.8.1 to 0.9.1.
- [Release notes](https://github.com/pkg/errors/releases)
- [Commits](pkg/errors@v0.8.1...v0.9.1)

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

go.mod

@@ -14,7 +14,7 @@ require (
 	github.com/kr/pretty v0.1.0 // indirect
 	github.com/mattn/go-zglob v0.0.1
 	github.com/op/go-logging v0.0.0-20160315200505-970db520ece7 // indirect
-	github.com/pkg/errors v0.8.1
+	github.com/pkg/errors v0.9.1
 	github.com/sassoftware/go-rpmutils v0.0.0-20190420191620-a8f1baeba37b
 	github.com/stretchr/testify v1.4.0
 	github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 // indirect

go.sum

@@ -31,6 +31,8 @@ github.com/op/go-logging v0.0.0-20160315200505-970db520ece7 h1:lDH9UUVJtmYCjyT0C
 github.com/op/go-logging v0.0.0-20160315200505-970db520ece7/go.mod h1:HzydrMdWErDVzsI23lYNej1Htcns9BCg93Dk0bBINWk=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/sassoftware/go-rpmutils v0.0.0-20190420191620-a8f1baeba37b h1:+gCnWOZV8Z/8jehJ2CdqB47Z3S+SREmQcuXkRFLNsiI=