add missing global-state expression typing (#1130)

* add missing global-state expression typing

* update changelog

Author: zbigniewmatysek-tomtom

CHANGELOG.md

@@ -4,6 +4,7 @@
 - _...Add new stuff here..._
 
 ### 🐞 Bug fixes
+- Add missing `global-state` expression typing ([#1130](https://github.com/maplibre/maplibre-style-spec/pull/1130))
 - _...Add new stuff here..._
 
 ## 23.2.3

build/generate-style-spec.ts

@@ -265,6 +265,8 @@ export type ExpressionSpecification =
     | ['zoom'] // number
     // Heatmap
     | ['heatmap-density'] // number
+    // Global state
+    | ['global-state', string] // unknown
 
 export type ExpressionFilterSpecification = boolean | ExpressionSpecification