migrate reference github.com/distribution/reference

The "reference" package was moved to a separate module, which was extracted
from b9b19409cf

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/image/pull.go

@@ -5,11 +5,11 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/distribution/reference"
 	"github.com/docker/cli/cli"
 	"github.com/docker/cli/cli/command"
 	"github.com/docker/cli/cli/command/completion"
 	"github.com/docker/cli/cli/trust"
-	"github.com/docker/distribution/reference"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 )