Test on ruby head

Author: MatheusRich

.github/workflows/main.yml

@@ -13,7 +13,7 @@ jobs:
     name: Ruby ${{ matrix.ruby }}
     strategy:
       matrix:
-        ruby: ['3.2', '3.3', '3.4']
+        ruby: ['3.2', '3.3', '3.4', 'head']
 
     steps:
       - uses: actions/checkout@v4