Fix failing issues with vendoring as well as compiling

Something within golang.org/x/sys messed up and it doesn't help that we
have three different projects using different versions.

This vendor update specifies a golang.org/x/sys as well as fixes the
previous compiling issues with Windows/Linux/macOS builds.

See issue:

```sh
gox -osarch="darwin/amd64 linux/amd64 linux/arm windows/amd64"
-output="bin/kompose-{{.OS}}-{{.Arch}}" -ldflags="-w -X
github.com/kubernetes/kompose/pkg/version.GITCOMMIT=42e7f0e"
Number of parallel builds: 1
-->   windows/amd64: github.com/kubernetes/kompose
-->     linux/amd64: github.com/kubernetes/kompose
-->    darwin/amd64: github.com/kubernetes/kompose
-->       linux/arm: github.com/kubernetes/kompose
1 errors occurred:
--> windows/amd64 error: exit status 2
Stderr: #
github.com/kubernetes/kompose/vendor/golang.org/x/crypto/ssh/terminal
vendor/golang.org/x/crypto/ssh/terminal/util_windows.go:42: undefined:
windows.ENABLE_ECHO_INPUT
vendor/golang.org/x/crypto/ssh/terminal/util_windows.go:42: undefined:
windows.ENABLE_PROCESSED_INPUT
vendor/golang.org/x/crypto/ssh/terminal/util_windows.go:42: undefined:
windows.ENABLE_LINE_INPUT
vendor/golang.org/x/crypto/ssh/terminal/util_windows.go:42: undefined:
windows.ENABLE_PROCESSED_OUTPUT
vendor/golang.org/x/crypto/ssh/terminal/util_windows.go:43: undefined:
windows.SetConsoleMode
vendor/golang.org/x/crypto/ssh/terminal/util_windows.go:62: undefined:
windows.SetConsoleMode
vendor/golang.org/x/crypto/ssh/terminal/util_windows.go:67: undefined:
windows.ConsoleScreenBufferInfo
vendor/golang.org/x/crypto/ssh/terminal/util_windows.go:68: undefined:
windows.GetConsoleScreenBufferInfo
vendor/golang.org/x/crypto/ssh/terminal/util_windows.go:91: undefined:
windows.ENABLE_ECHO_INPUT
vendor/golang.org/x/crypto/ssh/terminal/util_windows.go:92: undefined:
windows.ENABLE_PROCESSED_INPUT
vendor/golang.org/x/crypto/ssh/terminal/util_windows.go:92: too many
errors
```

vendor/github.com/magiconair/properties/lex.go

@@ -196,9 +196,8 @@ func lexBeforeKey(l *lexer) stateFn {
 		return lexComment
 
 	case isWhitespace(r):
-		l.acceptRun(whitespace)
 		l.ignore()
-		return lexKey
+		return lexBeforeKey
 
 	default:
 		l.backup()

vendor/github.com/magiconair/properties/properties.go

@@ -511,6 +511,9 @@ func (p *Properties) Set(key, value string) (prev string, ok bool, err error) {
 	if p.DisableExpansion {
 		prev, ok = p.Get(key)
 		p.m[key] = value
+		if !ok {
+			p.k = append(p.k, key)
+		}
 		return prev, ok, nil
 	}