Fix CI

Author: mtsmfm

.github/workflows/ubuntu-test.yml

@@ -22,10 +22,13 @@ jobs:
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
+      - run: |
+          gem update --system 3.2.3
+          gem install bundler -v 2.3.27
+          bundle add concurrent-ruby --version 1.3.4
+        if: matrix.ruby == '2.5' || matrix.ruby == '2.6'
       - run: gem update --system
-        if: matrix.ruby != '2.5' && matrix.ruby != '2.6' && matrix.ruby != '2.7'
-      - run: gem update --system 3.2.3
-        if: matrix.ruby == '2.6'
+        if: matrix.ruby != '2.5' && matrix.ruby != '2.6' && matrix.ruby != '2.7' && matrix.ruby != '3.0'
       - run: bundle exec rake
       - run: bundle exec rake
         env:

.github/workflows/windows-test.yml

@@ -22,10 +22,13 @@ jobs:
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
+      - run: |
+          gem update --system 3.2.3
+          gem install bundler -v 2.3.27
+          bundle add concurrent-ruby --version 1.3.4
+        if: matrix.ruby == '2.5' || matrix.ruby == '2.6'
       - run: gem update --system
-        if: matrix.ruby != '2.5' && matrix.ruby != '2.6' && matrix.ruby != '2.7'
-      - run: gem update --system 3.2.3
-        if: matrix.ruby == '2.6'
+        if: matrix.ruby != '2.5' && matrix.ruby != '2.6' && matrix.ruby != '2.7' && matrix.ruby != '3.0'
       - run: bundle exec rake
       - run: bundle exec rake
         env: