Bump github.com/traefik/yaegi from 0.9.8 to 0.15.1

Bumps [github.com/traefik/yaegi](https://github.com/traefik/yaegi) from 0.9.8 to 0.15.1.
- [Release notes](https://github.com/traefik/yaegi/releases)
- [Changelog](https://github.com/traefik/yaegi/blob/master/.goreleaser.yml)
- [Commits](traefik/yaegi@v0.9.8...v0.15.1)

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

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

go.mod

@@ -7,5 +7,5 @@ require (
 	github.com/hashicorp/go-multierror v1.1.1
 	github.com/pkg/errors v0.9.1
 	github.com/stretchr/testify v1.6.1
-	github.com/traefik/yaegi v0.9.8
+	github.com/traefik/yaegi v0.15.1
 )

go.sum

@@ -15,8 +15,9 @@ github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/traefik/yaegi v0.9.8 h1:sYGKV2d911B9olVsSO/nRmjIh+CQTffAUSzoyv4a4/4=
 github.com/traefik/yaegi v0.9.8/go.mod h1:FAYnRlZyuVlEkvnkHq3bvJ1lW5be6XuwgLdkYgYG6Lk=
+github.com/traefik/yaegi v0.15.1 h1:YA5SbaL6HZA0Exh9T/oArRHqGN2HQ+zgmCY7dkoTXu4=
+github.com/traefik/yaegi v0.15.1/go.mod h1:AVRxhaI2G+nUsaM1zyktzwXn69G3t/AuTDrCiTds9p0=
 go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=