#8 implement interface Source and methods for gitea without Update (#9)

Прикинул метод Open и Delete, Update пока не до делал.

Co-authored-by: Gorbunov Kirill Andreevich <kgorbunov@mtsbank.ru>
Reviewed-on: #9
Co-authored-by: Кирилл Горбунов <kirya_gorbunov_2015@mail.ru>
Co-committed-by: Кирилл Горбунов <kirya_gorbunov_2015@mail.ru>

internal/modules/modproxy.go

@@ -249,7 +249,8 @@ type UpdateOptions struct {
 	Modules  []module.Version
 	Pre      bool
 	Cached   bool
-	Major    bool
+	Major    bool // Major true compare only major
+	UpMajor  bool // UpMajor module up with major
 }
 
 // Updates finds updates for a set of specified modules.
@@ -275,7 +276,14 @@ func Updates(opt UpdateOptions) {
 					ch <- Update{Module: m, Err: err}
 					return nil
 				}
-				v := mod.MaxVersion("", opt.Pre)
+				major := semver.Major(m.Version)
+				var v string
+				switch opt.UpMajor {
+				case true:
+					v = mod.MaxVersion("", opt.Pre)
+				case false:
+					v = mod.MaxVersion(major, opt.Pre)
+				}
 				if IsNewerVersion(m.Version, v, opt.Major) {
 					ch <- Update{Module: m, Version: v}
 				}