chore(deps): bump github.com/mattn/go-isatty from 0.0.20 to 0.0.21

Bumps [github.com/mattn/go-isatty](https://github.com/mattn/go-isatty) from 0.0.20 to 0.0.21.
- [Commits](https://github.com/mattn/go-isatty/compare/v0.0.20...v0.0.21)

---
updated-dependencies:
- dependency-name: github.com/mattn/go-isatty
  dependency-version: 0.0.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/mattn/go-isatty/isatty_windows.go

@@ -31,6 +31,10 @@ func init() {
 	if procGetFileInformationByHandleEx.Find() != nil {
 		procGetFileInformationByHandleEx = nil
 	}
+	// Check if NtQueryObject is available.
+	if procNtQueryObject.Find() != nil {
+		procNtQueryObject = nil
+	}
 }
 
 // IsTerminal return true if the file descriptor is terminal.
@@ -45,7 +49,7 @@ func IsTerminal(fd uintptr) bool {
 //   \{cygwin,msys}-XXXXXXXXXXXXXXXX-ptyN-{from,to}-master
 func isCygwinPipeName(name string) bool {
 	token := strings.Split(name, "-")
-	if len(token) < 5 {
+	if len(token) != 5 {
 		return false
 	}
 
@@ -75,10 +79,10 @@ func isCygwinPipeName(name string) bool {
 	return true
 }
 
-// getFileNameByHandle use the undocomented ntdll NtQueryObject to get file full name from file handler
+// getFileNameByHandle use the undocumented ntdll NtQueryObject to get file full name from file handler
 // since GetFileInformationByHandleEx is not available under windows Vista and still some old fashion
 // guys are using Windows XP, this is a workaround for those guys, it will also work on system from
-// Windows vista to 10
+// Windows Vista to 10
 // see https://stackoverflow.com/a/18792477 for details
 func getFileNameByHandle(fd uintptr) (string, error) {
 	if procNtQueryObject == nil {