Add rubies 3.2, 3.3 and 3.4 to test matrix (#13)

Author: biow0lf

.github/workflows/rspec.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["3.1"]
+        ruby: ["3.1", "3.2", "3.3", "3.4"]
 
     steps:
       - uses: actions/checkout@v4