support registry:2.7 +, fix https://github.com/heroku/docker-registry-client/issues/82

[zhangguanzhang]

Fixes: #82

(dlv) s
> github.com/heroku/docker-registry-client/registry.getNextLink() /root/go/pkg/mod/github.com/heroku/[email protected]/registry/json.go:44 (PC: 0x17e0826)
    39:	// `rel="next"` may not have quoted values in the wild.
    40:	var nextLinkRE = regexp.MustCompile(`^ *<?([^;>]+)>? *(?:;[^;]*)*; *rel="?next"?(?:;.*)?`)
    41:	
    42:	func getNextLink(resp *http.Response) (string, error) {
    43:		for _, link := range resp.Header[http.CanonicalHeaderKey("Link")] {
=>  44:			parts := nextLinkRE.FindStringSubmatch(link)
    45:			if parts != nil {
    46:				return parts[1], nil
    47:			}
    48:		}
    49:		return "", ErrNoMorePages
(dlv) p link
"</v2/_catalog?last=wps%2Fkdocs-kat-migrate&n=100>; rel=\"next\""

Signed-off-by: zhangguanzhang [email protected]

[zhangguanzhang]

@tt @lorenzobenvenuti @danielkrainas @glasser @jmahowald @svc-scm @jeinwag
@edmorley any one still maintained?

[zhangguanzhang]

@agnaite @beanieboi @brendangatens @chadian @crawfoal
any one still maintained?