Merge pull request ota42y#141 from ota42y/ota42y/version_up

rsupport ruby 3.2

Author: ota42y

.github/workflows/ci.yaml

@@ -5,8 +5,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest]
-        ruby: [2.6, 2.7, '3.0', '3.1']
+        os:
+          - ubuntu-latest
+          - macos-latest
+        ruby:
+          - "2.6"
+          - "2.7"
+          - "3.0"
+          - "3.1"
+          - "3.2"
+          - ruby-head
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v2