Bump dependencies to Kubernetes 1.20

vendor/k8s.io/client-go/tools/clientcmd/config.go

@@ -83,10 +83,13 @@ func (o *PathOptions) GetEnvVarFiles() []string {
 }
 
 func (o *PathOptions) GetLoadingPrecedence() []string {
+	if o.IsExplicitFile() {
+		return []string{o.GetExplicitFile()}
+	}
+
 	if envVarFiles := o.GetEnvVarFiles(); len(envVarFiles) > 0 {
 		return envVarFiles
 	}
-
 	return []string{o.GlobalFile}
 }