Modifiers support

[j-g00da]

• BOLD - 74e9c3f
• DIM - Modifier and Blink Support #172
• ITALIC - Italic modifier support #55
• UNDERLINED - 74e9c3f
• SLOW_BLINK - Modifier and Blink Support #172
• RAPID_BLINK - Modifier and Blink Support #172
• REVERSED - Modifier and Blink Support #172
• HIDDEN - Modifier and Blink Support #172
• CROSSED_OUT - 74e9c3f

[orhun]

now implemented in #172