Add v2 version to go module name

Replace all elements from `v2` to root directory.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

object/string.go

@@ -0,0 +1,55 @@
+package object
+
+import (
+	object "github.com/nspcc-dev/neofs-api-go/v2/object/grpc"
+)
+
+// String returns string representation of Type.
+func (t Type) String() string {
+	return TypeToGRPCField(t).String()
+}
+
+// FromString parses Type from a string representation.
+// It is a reverse action to String().
+//
+// Returns true if s was parsed successfully.
+func (t *Type) FromString(s string) bool {
+	var g object.ObjectType
+
+	ok := g.FromString(s)
+
+	if ok {
+		*t = TypeFromGRPCField(g)
+	}
+
+	return ok
+}
+
+// TypeFromString converts string to Type.
+//
+// Deprecated: use FromString method.
+func TypeFromString(s string) (t Type) {
+	t.FromString(s)
+	return
+}
+
+// String returns string representation of MatchType.
+func (t MatchType) String() string {
+	return MatchTypeToGRPCField(t).String()
+}
+
+// FromString parses MatchType from a string representation.
+// It is a reverse action to String().
+//
+// Returns true if s was parsed successfully.
+func (t *MatchType) FromString(s string) bool {
+	var g object.MatchType
+
+	ok := g.FromString(s)
+
+	if ok {
+		*t = MatchTypeFromGRPCField(g)
+	}
+
+	return ok
+}