add redo

add redo function and add safety when applying previous and future states

• Merge pull request #3 from charkour/redo c93453c
• update docs 21901c3
• check for existing states before trying to undo/redo 3562e00
• add redo feature 1c61e1f
• Update README.md af2366d
• Update README.md 9bd237e
• Update README.md 88f32f6

v0.1.3...v0.2.0

v0.1.3

• Merge branch 'main' of https://github.com/charkour/zundo into main 96f1f51
• remove console.log 9a20e9f
• Update README.md ce88601

v0.1.2...v0.1.3

v0.1.2

• add gif 731d890
• add demo 8649bcb
• fix typo 3d474d2

v0.1.1...v0.1.2

initial release

• add storybook packages a545f0b
• convert to typescript ef764f0
• update story names e0d000b
• remove unused devdeps 1169ac7
• update readme 40e9521
• update repo d47b22c
• add useUndo and undo middleware 9fc6bd7

916fe4c...v0.1.1