build(deps): bump github.com/coreos/go-oidc

Bumps [github.com/coreos/go-oidc](https://github.com/coreos/go-oidc) from 2.1.0+incompatible to 2.2.1+incompatible.
- [Release notes](https://github.com/coreos/go-oidc/releases)
- [Commits](coreos/go-oidc@v2.1.0...v2.2.1)

---
updated-dependencies:
- dependency-name: github.com/coreos/go-oidc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/armon/go-radix v1.0.0
 	github.com/aws/aws-sdk-go v1.42.34
 	github.com/coredns/coredns v1.1.2
-	github.com/coreos/go-oidc v2.1.0+incompatible
+	github.com/coreos/go-oidc v2.2.1+incompatible
 	github.com/digitalocean/godo v1.10.0 // indirect
 	github.com/docker/go-connections v0.3.0
 	github.com/elazarl/go-bindata-assetfs v0.0.0-20160803192304-e1a2a7ec64b0

go.sum

@@ -99,8 +99,8 @@ github.com/coredns/coredns v1.1.2/go.mod h1:zASH/MVDgR6XZTbxvOnsZfffS+31vg6Ackf/
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
 github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
-github.com/coreos/go-oidc v2.1.0+incompatible h1:sdJrfw8akMnCuUlaZU3tE/uYXFgfqom8DBE9so9EBsM=
-github.com/coreos/go-oidc v2.1.0+incompatible/go.mod h1:CgnwVTmzoESiwO9qyAFEMiHoZ1nMCKZlZ9V6mm3/LKc=
+github.com/coreos/go-oidc v2.2.1+incompatible h1:mh48q/BqXqgjVHpy2ZY7WnWAbenxRjsz9N1i1YxjHAk=
+github.com/coreos/go-oidc v2.2.1+incompatible/go.mod h1:CgnwVTmzoESiwO9qyAFEMiHoZ1nMCKZlZ9V6mm3/LKc=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=