(maint) Update to 9.4.1.0-jdk8 and fix spec test.

.github/workflows/testing.yml

@@ -18,8 +18,7 @@ jobs:
     strategy:
       matrix:
         ruby-version:
-          - 'jruby-9.3.6.0'
-          - 'jruby-9.4.0.0'
+          - 'jruby-9.4.1.0'
     steps:
     - uses: actions/checkout@v3
     - name: Set up Ruby
@@ -35,8 +34,7 @@ jobs:
     strategy:
       matrix:
         ruby-version:
-          - 'jruby-9.3.6.0'
-          - 'jruby-9.4.0.0'
+          - 'jruby-9.4.1.0'
     steps:
     - uses: actions/checkout@v3
     - name: Set up Ruby

lib/vmpooler.rb

@@ -34,7 +34,7 @@ module Vmpooler
       config_string = ENV['VMPOOLER_CONFIG']
       # Parse the YAML config into a Hash
       # Allow the Symbol class
-      parsed_config = YAML.safe_load(config_string, [Symbol])
+      parsed_config = YAML.safe_load(config_string, permitted_classes: [Symbol])
     else
       # Take the name of the config file either from an ENV variable or from the filepath argument
       config_file = ENV['VMPOOLER_CONFIG_FILE'] || filepath

update-gemfile-lock

@@ -3,5 +3,5 @@
 # The container tag should closely match what is used in `docker/Dockerfile` in vmpooler-deployment
 docker run -it --rm \
   -v $(pwd):/app \
-  jruby:9.3.6-jdk \
+  jruby:9.4.1.0-jdk8 \
   /bin/bash -c 'apt-get update -qq && apt-get install -y --no-install-recommends make git && cd /app && gem install bundler && bundle install --jobs 3 && bundle update; echo "LOCK_FILE_UPDATE_EXIT_CODE=$?"'