v1.3.0

• Add constant: keys.ShiftTAB = "\x1B[Z"
• Simplify the terminal interface and implements (Compatibility around ITty is broken)

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• 定数追加: keys.ShiftTAB = "\x1B[Z"
• 端末のインターフェイスと実装を簡素化 (ITty 周辺の互換性破壊)