Update changelog

CHANGELOG.md

@@ -11,7 +11,11 @@ backwards compatible with 1.x. To upgrade, consider using a pattern like that in
 * Rename `RedbValue` to `Value`
 * Remove lifetimes from read-only tables
 * Remove lifetime from `WriteTransaction` and `ReadTransaction`
+* Remove `drain()` and `drain_filter()` from `Table`
 * impl `Clone` for `Range`
+* Add `len()` and `is_empty()` to `MultimapValue`
+* Add `retain()` and `retain_in()` to `Table`
+* Add `extract_if()` and `extract_from_if()` to `Table`
 * Add `range()` returning a `Range` with the `'static` lifetime to read-only tables
 * Add `get()` returning a range with the `'static` lifetime to read-only multimap tables
 * Add `close()` method to `ReadTransaction`