Disable Java 21 for now as Mockito doesn't support it yet, but keep config ready for a few months time.

Author: ascopes

.github/workflows/build.yml

@@ -30,8 +30,9 @@ jobs:
           #   to support Java 20 bytecode. Therefore, we have to skip coverage here.
           - os-name: ubuntu-22.04
             java-version: 20-ea
-          - os-name: ubuntu-22.04
-            java-version: 21-ea
+          # Mockito doesn't yet support Java 21, so let's comment it out for now.
+          # - os-name: ubuntu-22.04
+          #   java-version: 21-ea
 
           # MacOS builds (only check Java 11 and 19).
           - os-name: macos-12

README.md

@@ -1,4 +1,4 @@
-![Java 11+](https://img.shields.io/badge/Java-11--21-brown?logo=openjdk)
+![Java 11+](https://img.shields.io/badge/Java-11--20-brown?logo=openjdk)
 [![Build Status](https://github.com/ascopes/java-compiler-testing/actions/workflows/build.yml/badge.svg?branch=main)](https://github.com/ascopes/java-compiler-testing/actions/workflows/build.yml)
 [![Maven Central](https://img.shields.io/maven-central/v/io.github.ascopes.jct/java-compiler-testing)](https://repo1.maven.org/maven2/io/github/ascopes/jct/java-compiler-testing)
 [![Code Coverage](https://codecov.io/gh/ascopes/java-compiler-testing/branch/main/graph/badge.svg?token=VT74BP2742)](https://codecov.io/gh/ascopes/java-compiler-testing)