Add changeset about conditional actions

.changeset/good-countries-cross.md

@@ -0,0 +1,20 @@
+---
+'xstate': minor
+---
+
+Added support for conditional actions. It's possible now to have actions executed based on conditions using following:
+
+```js
+entry: [
+  decide([
+    { cond: ctx => ctx > 100, actions: raise('TOGGLE') },
+    {
+      cond: 'hasMagicBottle',
+      actions: [assign(ctx => ({ counter: ctx.counter + 1 }))]
+    },
+    { actions: ['fallbackAction'] }
+  ])
+];
+```
+
+It works very similar to the if-else syntax where only the first matched condition is causing associated actions to be executed and the last ones can be unconditional (serving as a general fallback, just like else branch).