Add Java 15

Author: alysbrooks

.circleci/config.yml

@@ -2,7 +2,7 @@ version: 2.1
 
 orbs:
   kaocha: lambdaisland/[email protected]
-  clojure: lambdaisland/[email protected].1
+  clojure: lambdaisland/[email protected].2
 
 commands:
   checkout_and_run:
@@ -26,6 +26,10 @@ commands:
                 flags: clj
 
 jobs:
+  java-15-clojure-1_10:
+    executor: clojure/openjdk15
+    steps: [{checkout_and_run: {clojure_version: "1.10.1"}}]
+    
   java-11-clojure-1_10:
     executor: clojure/openjdk11
     steps: [{checkout_and_run: {clojure_version: "1.10.1"}}]
@@ -41,6 +45,7 @@ jobs:
 workflows:
   kaocha_test:
     jobs:
+      - java-15-clojure-1_10
       - java-11-clojure-1_10
       - java-9-clojure-1_10
       - java-8-clojure-1_10