chore: changelog for plugin-legacy [skip ci]

yyx990803 · yyx990803 · commit 52ac81a14298 · 2021-01-07T15:41:48.000-05:00
diff --git a/packages/plugin-legacy/CHANGELOG.md b/packages/plugin-legacy/CHANGELOG.md
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+# 1.0.0 (2021-01-07)
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+
+### Features
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+* **plugin-legacy:** @vitejs/plugin-legacy ([8c34870](https://github.com/vitejs/vite/commit/8c34870040f8c2f4be7d00245a3683f9e64d894e))
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