Bump github.com/square/go-jose (#6)

Bumps [github.com/square/go-jose](https://github.com/square/go-jose) from 2.5.1+incompatible to 2.6.0+incompatible.
- [Release notes](https://github.com/square/go-jose/releases)
- [Commits](square/go-jose@v2.5.1...v2.6.0)

---
updated-dependencies:
- dependency-name: github.com/square/go-jose
  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

@@ -5,7 +5,7 @@ go 1.12
 require (
 	github.com/google/go-cmp v0.5.4 // indirect
 	github.com/patrickmn/go-cache v2.1.0+incompatible
-	github.com/square/go-jose v2.5.1+incompatible
+	github.com/square/go-jose v2.6.0+incompatible
 	github.com/stretchr/testify v1.6.1 // indirect
 	golang.org/x/crypto v0.0.0-20180621125126-a49355c7e3f8 // indirect
 	golang.org/x/net v0.0.0-20180729183719-c4299a1a0d85 // indirect

go.sum

@@ -6,8 +6,8 @@ github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaR
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 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/square/go-jose v2.5.1+incompatible h1:FC+BwI9FzJZWpKaE0yUhFNbp/CyFHndARzuGVME/LGk=
-github.com/square/go-jose v2.5.1+incompatible/go.mod h1:7MxpAF/1WTVUu8Am+T5kNy+t0902CaLWM4Z745MkOa8=
+github.com/square/go-jose v2.6.0+incompatible h1:X2EdV1z4PViZnxy2B+nY+HizcJKWuHZ0vN8Ju3R2No8=
+github.com/square/go-jose v2.6.0+incompatible/go.mod h1:7MxpAF/1WTVUu8Am+T5kNy+t0902CaLWM4Z745MkOa8=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=