build(cargo): update to edition 2021
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@@ -6,7 +6,7 @@ license = "MIT"
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repository = "https://github.com/EdJoPaTo/tui-rs-tree-widget"
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repository = "https://github.com/EdJoPaTo/tui-rs-tree-widget"
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documentation = "https://docs.rs/tui-tree-widget"
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documentation = "https://docs.rs/tui-tree-widget"
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authors = ["EdJoPaTo <tui-tree-widget-rust-crate@edjopato.de>"]
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authors = ["EdJoPaTo <tui-tree-widget-rust-crate@edjopato.de>"]
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edition = "2018"
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edition = "2021"
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rust-version = "1.56.1"
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rust-version = "1.56.1"
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keywords = ["tui", "terminal", "tree", "widget"]
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keywords = ["tui", "terminal", "tree", "widget"]
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categories = ["command-line-interface"]
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categories = ["command-line-interface"]
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