ci: build and test with JDK 21

.drone.yml

@@ -3,7 +3,7 @@ name: default
 
 steps:
   - name: compile
-    image: maven:3-eclipse-temurin-17
+    image: maven:3-eclipse-temurin-21
     commands:
       - mvn -B clean compile
     when:
@@ -14,7 +14,7 @@ steps:
         - fix/*
         - release/*
   - name: unit-tests
-    image: maven:3-eclipse-temurin-17
+    image: maven:3-eclipse-temurin-21
     commands:
       - mvn -B test
     when:
@@ -38,7 +38,7 @@ steps:
         - main
         - release/*
   - name: unit-integration-tests
-    image: maven:3-eclipse-temurin-17
+    image: maven:3-eclipse-temurin-21
     environment:
       VAULT_VERSION: 1.15.0
     commands:

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        jdk: [ 11, 17, 20 ]
+        jdk: [ 11, 17, 21 ]
         vault: [ '1.2.0', '1.11.12', '1.15.0' ]
         include:
           - jdk: 17