Chore: add Type() method to proxy.Proxy

proxy/shadowsocks.go

@@ -14,6 +14,8 @@ import (
 	"github.com/Dreamacro/go-shadowsocks2/core"
 )
 
+var _ Proxy = (*ShadowSocks)(nil)
+
 type ShadowSocks struct {
 	*Base
 
@@ -37,6 +39,10 @@ func NewShadowSocks(addr, method, password, obfsMode, obfsHost string) (*ShadowS
 	}, nil
 }
 
+func (ss *ShadowSocks) Type() string {
+	return "ss"
+}
+
 func (ss *ShadowSocks) DialContext(ctx context.Context, metadata *adapter.Metadata) (c net.Conn, err error) {
 	c, err = dialer.DialContext(ctx, "tcp", ss.Addr())
 	if err != nil {