change the placeholder parameters into an object

[JordyHers]

The placeholder parameters of the flutter resume template can be changed into an Object param.

FlutterResumeTemplate(
            data: data,
            imageHeight: 100,
            imageWidth: 100,
            emailPlaceHolder: 'Email:', // <- From this
            telPlaceHolder: 'No:',
            experiencePlaceHolder: 'Past',
            educationPlaceHolder: 'School',
            languagePlaceHolder: 'Skills',
            aboutMePlaceholder: 'Me',
            hobbiesPlaceholder: 'Past Times', // -> till here
            mode: TemplateMode.onlyEditableMode,
            showButtons: true,
            imageBoxFit: BoxFit.fitHeight,
            enableDivider: false,
            backgroundColorLeftSection: Colors.blueGrey,
            templateTheme: theme),