update CHANGELOG.md

xxapp · Sep 2, 2017 · 686955f · 686955f
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diff --git a/CHANGELOG.md b/CHANGELOG.md
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+0.1.9 / 2017-09-02
+------------------
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+- tree 组件，增加 expandedKeys 属性
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 0.1.8 / 2017-08-31
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