Add JDK 15/16 To The CircleCI Build

Though JDK16 is not yet released, building with it now will give us warnings about issues such as failure to build on JDK15 (#450)

Also adds the `osgiBundle` task to CI to catch issues with it.

Author: isomarcte

.circleci/config.yml

@@ -9,10 +9,16 @@ executors:
       - image: circleci/openjdk:11-jdk
   scala_jdk13_executor:
     docker:
-      - image: circleci/openjdk:13.0.1-jdk-buster
+      - image: circleci/openjdk:13-buster
   scala_jdk14_executor:
     docker:
-      - image: circleci/openjdk:14-ea-26-jdk-buster
+      - image: circleci/openjdk:14-buster
+  scala_jdk15_executor:
+    docker:
+      - image: circleci/openjdk:15-buster
+  scala_jdk16_executor:
+    docker:
+      - image: circleci/openjdk:16-buster
 
 commands:
   sbt_cmd:
@@ -23,7 +29,7 @@ commands:
         default: 2.12.12
       sbt_tasks:
         type: string
-        default: update compile test:compile test doc package
+        default: update compile test:compile test doc package osgiBundle
     steps:
       - restore_cache:
           keys:
@@ -55,7 +61,7 @@ jobs:
       - run: java -version
       - sbt_cmd:
           scala_version: << parameters.scala_version >>
-          sbt_tasks: xml/update xml/compile xml/test:compile xml/test xml/doc xml/package
+          sbt_tasks: xml/update xml/compile xml/test:compile xml/test xml/doc xml/package xml/osgiBundle
   scalajs_job:
     executor: scala_jdk8_executor
     parameters:
@@ -128,6 +134,30 @@ workflows:
           name: jdk14_dotty
           java_version: jdk14
           scala_version: 0.27.0-RC1
+      - scala_job:
+          name: jdk15_2.12
+          java_version: jdk15
+          scala_version: 2.12.12
+      - scala_job:
+          name: jdk15_2.13
+          java_version: jdk15
+          scala_version: 2.13.3
+      - scala_job:
+          name: jdk15_dotty
+          java_version: jdk15
+          scala_version: 0.27.0-RC1
+      - scala_job:
+          name: jdk16_2.12
+          java_version: jdk16
+          scala_version: 2.12.12
+      - scala_job:
+          name: jdk16_2.13
+          java_version: jdk16
+          scala_version: 2.13.3
+      - scala_job:
+          name: jdk16_dotty
+          java_version: jdk16
+          scala_version: 0.27.0-RC1
       - scalajs_job:
           name: sjs1.0_2.12
           scala_version: 2.12.12