improve constraint matching, migration structure

list.go

@@ -4,11 +4,19 @@ package version
 type List []*Version
 
 // Match tests versions against a constraint and returns a new List of matching versions only.
-func (list List) Match(c *Constraint) List {
+func (list List) Match(constraints ...*Constraint) List {
 	filtered := List{}
 
 	for _, v := range list {
-		if v.Match(c) {
+		ok := true
+		for _, c := range constraints {
+			if !v.Match(c) {
+				ok = false
+				break
+			}
+		}
+
+		if ok {
 			filtered = append(filtered, v)
 		}
 	}