Update changelog

Author: dvg-p4

CHANGELOG.md

@@ -3,6 +3,20 @@
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+## In development
+
+### Breaking changes
+
+- `clearOptions()` removes currently-selected items in addition to deselecting them by default, as
+  it did prior to selectize v0.12.5.
+
+### New features
+
+- `clearOptions()` has a new parameter `removeCurrentItems`, default `true`. If set `false`, it will
+  leave currently-selected items available *and selected*, as was the case from v0.12.5 to v0.13.0.
+  - For consistency, `silent` also has a (backwards-compatible) default value of `false` now.
+  - The full signature is thus `clearOptions(silent = false, removeCurrentItems = true)`
+
 ## v0.15.1 · 17 11 2022
 
 - New feature: dynamically add option groups