Update dependencies

vendor/github.com/docker/docker/client/plugin_enable.go

@@ -0,0 +1,19 @@
+package client
+
+import (
+	"net/url"
+	"strconv"
+
+	"github.com/docker/docker/api/types"
+	"golang.org/x/net/context"
+)
+
+// PluginEnable enables a plugin
+func (cli *Client) PluginEnable(ctx context.Context, name string, options types.PluginEnableOptions) error {
+	query := url.Values{}
+	query.Set("timeout", strconv.Itoa(options.Timeout))
+
+	resp, err := cli.post(ctx, "/plugins/"+name+"/enable", query, nil, nil)
+	ensureReaderClosed(resp)
+	return err
+}