ci: drop installation of swisnl/illuminate-collections

Author: JaZo

.github/workflows/tests.yml

@@ -51,7 +51,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          composer require "illuminate/contracts:${{ matrix.laravel }}" "swisnl/illuminate-collections:${{ matrix.laravel }}" --no-interaction --no-update
+          composer require "illuminate/contracts:${{ matrix.laravel }}" --no-interaction --no-update
           composer update --${{ matrix.stability }} --prefer-dist --no-interaction
 
       - name: Execute tests