(#283) Enable circe-ci on more rubies

Author: bastelfreak

.circleci/config.yml

@@ -1,15 +1,39 @@
 version: 2
 jobs:
-  puppetlabs_spec:
+  puppetlabs_spec_ruby24:
     docker:
       - image: circleci/ruby:2.4-node
     steps:
       - checkout
       - run: bundle install
       - run: bundle exec rake
+  puppetlabs_spec_ruby25:
+    docker:
+      - image: circleci/ruby:2.5-node
+    steps:
+      - checkout
+      - run: bundle install
+      - run: bundle exec rake
+  puppetlabs_spec_ruby27:
+    docker:
+      - image: circleci/ruby:2.7-node
+    steps:
+      - checkout
+      - run: bundle install
+      - run: bundle exec rake
+  puppetlabs_spec_ruby3:
+    docker:
+      - image: circleci/ruby:3.0-node
+    steps:
+      - checkout
+      - run: bundle install
+      - run: bundle exec rake
 
 workflows:
   version: 2
   test:
     jobs:
-      - puppetlabs_spec
+      - puppetlabs_spec_ruby24
+      - puppetlabs_spec_ruby25
+      - puppetlabs_spec_ruby27
+      - puppetlabs_spec_ruby3