https://github.com/sendbird/sendbird-uikit-ios/releases/tag/v2.1.3
• Added properties in SBUMessageInputView.
• textViewMinHeight: the minimun height of the textview.
• textViewMaxHeight: the maximum height of the textview.
• textViewLeadingSpacing: the spacing between the textview and the + button.
• textViewTrailingSpacing: the spacing between the textview and the send button.
• layoutInsets: the outer spacing of the SBUMessageInputView, relative to safeAreaLayoutGuide.
• showsSendButton: whether to always show the send button.
• Applied tint to all SBUIconSet.
• Applied localization on datetime string.
• Improved stability.
