Bump github.com/containers/common from 0.20.3 to 0.21.0

Bumps [github.com/containers/common](https://github.com/containers/common) from 0.20.3 to 0.21.0.
- [Release notes](https://github.com/containers/common/releases)
- [Commits](https://github.com/containers/common/compare/v0.20.3...v0.21.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

vendor/github.com/moby/sys/mountinfo/mountinfo_unsupported.go

@@ -0,0 +1,17 @@
+// +build !windows,!linux,!freebsd freebsd,!cgo
+
+package mountinfo
+
+import (
+	"fmt"
+	"io"
+	"runtime"
+)
+
+func parseMountTable(_ FilterFunc) ([]*Info, error) {
+	return nil, fmt.Errorf("mount.parseMountTable is not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
+}
+
+func parseInfoFile(_ io.Reader, f FilterFunc) ([]*Info, error) {
+	return parseMountTable(f)
+}