Bump fleather from 1.10.0 to 1.13.0

Bumps fleather from 1.10.0 to 1.13.0.

Release notes

Sourced from fleather's releases.

v1.13.0

• Enhanced text selection experience on mobile (including magnifier)
• [Fix] Vertical cursor movements have incorrect behavior when initiated from a line with large embeds

v1.12.0

• Introduce AutoFormats to handle automatic text formatting and make Heuristics only responsible for validity of document
• Show context menu on desktop
• Add unset background and text color option
• Handle more text editing intents (See #180 for the list)
• [Fix] toolbar button design
• [Fix] preserve line style on new line
• [Fix] example app build for Android

v1.11.0

• Support for Flutter 3.16
• [Fix] exception thrown when inserting new line with toggled inline styles

Commits

• 019f3fe Release v1.13.0 (#209)
• f38278c Fix RenderEditableTextLine's getPositionAbove (#207)
• e043d4f Android - add selection handle on collapsed selection (#203)
• 5c77e83 Add magnifier to text selection & better platform-specific behavior of text s...
• cc0ea76 Release v1.12.0 (#193)
• 50baf00 Accept AutoFormats in FleatherController constructor (#194)
• 6cd43c4 Fix text direction auto format detection and undo (#191)
• 051a5a4 Preserve line style when entering new line (#190)
• 4c3e95f Auto formats (#181)
• 00b14a0 Handle more text editing intents (#189)
• Additional commits viewable in compare view

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