Test 3.1-3.4 in CI

Author: marcoroth

.github/workflows/main.yml .github/workflows/build.yml.github/workflows/main.yml renamed to .github/workflows/build.yml

@@ -1,4 +1,4 @@
-name: Ruby
+name: Build
 
 on:
   push:
@@ -14,7 +14,10 @@ jobs:
     strategy:
       matrix:
         ruby:
-          - '3.4.1'
+          - '3.1'
+          - '3.2'
+          - '3.3'
+          - '3.4'
 
     steps:
       - name: Checkout