Update logrus to v1.6.0

Fixes #3223 by bumping logrus to v1.6.0, which in turn bumps
github.com/konsorten/go-windows-terminal-sequences to v1.0.3
wherein the fix to bad pointer is found.

Signed-off-by: Andreas Hassing <andreas@famhassing.dk>

vendor/github.com/sirupsen/logrus/json_formatter.go

@@ -28,6 +28,9 @@ type JSONFormatter struct {
 	// DisableTimestamp allows disabling automatic timestamps in output
 	DisableTimestamp bool
 
+	// DisableHTMLEscape allows disabling html escaping in output
+	DisableHTMLEscape bool
+
 	// DataKey allows users to put all the log entry parameters into a nested dictionary at a given key.
 	DataKey string
 
@@ -110,6 +113,7 @@ func (f *JSONFormatter) Format(entry *Entry) ([]byte, error) {
 	}
 
 	encoder := json.NewEncoder(b)
+	encoder.SetEscapeHTML(!f.DisableHTMLEscape)
 	if f.PrettyPrint {
 		encoder.SetIndent("", "  ")
 	}