go.mod: github.com/containerd/continuity v0.3.0

https://github.com/containerd/continuity/compare/v0.2.2...v0.3.0

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

vendor/github.com/Microsoft/go-winio/file.go

@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 package winio
@@ -143,6 +144,11 @@ func (f *win32File) Close() error {
 	return nil
 }
 
+// IsClosed checks if the file has been closed
+func (f *win32File) IsClosed() bool {
+	return f.closing.isSet()
+}
+
 // prepareIo prepares for a new IO operation.
 // The caller must call f.wg.Done() when the IO is finished, prior to Close() returning.
 func (f *win32File) prepareIo() (*ioOperation, error) {