support also string[] in rules.exists

Author: noxify

.changeset/lovely-showers-film.md

@@ -0,0 +1,5 @@
+---
+"@noxify/gitlab-ci-builder": patch
+---
+
+support also `string[]` in `rules.exists`

src/types/rules.ts

@@ -17,7 +17,7 @@ type RulesDefinition<T = WhenOptions> = {
   /**
    * @see https://docs.gitlab.com/ci/yaml/#rulesexists
    */
-  exists?: string
+  exists?: string | string[]
   /**
    * @see https://docs.gitlab.com/ci/yaml/#ruleswhen
    */