Merge pull request #734 from OpenAPITools/circle-ci-jdk-image-update

Migrate from deprecated circleCi openJDK image

Author: DrSatyr

.circleci/config.yml

@@ -5,7 +5,7 @@ jobs:
     working_directory: ~/openapi-diff
 
     docker:
-      - image: circleci/openjdk:8-jdk-node-browsers
+      - image: cimg/openjdk:8.0.442
 
     steps: