Merge pull request #92 from kentarohorie/add_test_targets

Add test targets of Ruby

Author: ashie

.github/workflows/linux.yml

@@ -9,11 +9,10 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - '2.4'
-          - '2.5'
-          - '2.6'
           - '2.7'
           - '3.0'
+          - '3.1'
+          - '3.2'
         os:
           - ubuntu-latest
     name: Ruby ${{ matrix.ruby }} unit testing on ${{ matrix.os }}