squash: install latest bundler

Author: arielvalentin

.github/actions/test_gem/action.yml

@@ -80,21 +80,12 @@ runs:
       shell: bash
       run: sudo apt update && sudo apt install -y imagemagick
 
-    # Install ruby and bundle dependencies and cache!
-    # ...but not for appraisals, sadly.
-    - name: Install Ruby ${{ inputs.ruby }} with dependencies
-      if: "${{ steps.setup.outputs.appraisals == 'false' }}"
-      uses: ruby/[email protected]
-      with:
-        ruby-version: "${{ inputs.ruby }}"
-        working-directory: "${{ steps.setup.outputs.gem_dir }}"
-
     # If we're using appraisals, do it all manually.
     - name: Install Ruby ${{ inputs.ruby }} without dependencies
-      if: "${{ steps.setup.outputs.appraisals == 'true' }}"
       uses: ruby/[email protected]
       with:
         ruby-version: "${{ inputs.ruby }}"
+        bundler: "latest"
         working-directory: "${{ steps.setup.outputs.gem_dir }}"
 
     - name: Install dependencies and generate appraisals
@@ -124,7 +115,7 @@ runs:
           done
         else
           echo "::group::🔎 Running Tests Standalone"
-          bundle install
+          bundle install --quiet --jobs=3 --retry=4 && \
           bundle exec rake test
           echo "::endgroup::"
         fi