See #856 - adds missing History.md entry.

diff --git a/History.md b/History.md
index 7ae329e..ba5105c 100644 (file)
--- a/History.md
+++ b/History.md
@@ -44,6 +44,7 @@
 * Fixed issue [#845](https://github.com/jakubpawlowicz/clean-css/issues/845) - web compatibility of 4.0 branch.
 * Fixed issue [#847](https://github.com/jakubpawlowicz/clean-css/issues/847) - regression in handling invalid selectors.
 * Fixed issue [#849](https://github.com/jakubpawlowicz/clean-css/issues/849) - disables inlining protocol-less resources.
+* Fixed issue [#856](https://github.com/jakubpawlowicz/clean-css/issues/856) - allows `minify` to return a promise.
 * Fixed issue [#857](https://github.com/jakubpawlowicz/clean-css/issues/857) - normalizes CleanCSS API interface.
 * Fixed issue [#863](https://github.com/jakubpawlowicz/clean-css/issues/863) - adds `transform` callback for custom optimizations.