Add v2 version to go module name

Replace all elements from `v2` to root directory.

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

netmap/string.go

@@ -0,0 +1,68 @@
+package netmap
+
+import (
+	netmap "github.com/nspcc-dev/neofs-api-go/v2/netmap/grpc"
+)
+
+// String returns string representation of Clause.
+func (x Clause) String() string {
+	return ClauseToGRPCMessage(x).String()
+}
+
+// FromString parses Clause from a string representation.
+// It is a reverse action to String().
+//
+// Returns true if s was parsed successfully.
+func (x *Clause) FromString(s string) bool {
+	var g netmap.Clause
+
+	ok := g.FromString(s)
+
+	if ok {
+		*x = ClauseFromGRPCMessage(g)
+	}
+
+	return ok
+}
+
+// String returns string representation of Operation.
+func (x Operation) String() string {
+	return OperationToGRPCMessage(x).String()
+}
+
+// FromString parses Operation from a string representation.
+// It is a reverse action to String().
+//
+// Returns true if s was parsed successfully.
+func (x *Operation) FromString(s string) bool {
+	var g netmap.Operation
+
+	ok := g.FromString(s)
+
+	if ok {
+		*x = OperationFromGRPCMessage(g)
+	}
+
+	return ok
+}
+
+// String returns string representation of NodeState.
+func (x NodeState) String() string {
+	return NodeStateToGRPCMessage(x).String()
+}
+
+// FromString parses NodeState from a string representation.
+// It is a reverse action to String().
+//
+// Returns true if s was parsed successfully.
+func (x *NodeState) FromString(s string) bool {
+	var g netmap.NodeInfo_State
+
+	ok := g.FromString(s)
+
+	if ok {
+		*x = NodeStateFromRPCMessage(g)
+	}
+
+	return ok
+}