Added support for Java 21 and removed support for Java 11. (#640)

Signed-off-by: Helber Belmiro <helber.belmiro@gmail.com>

.github/workflows/build.yml

@@ -29,8 +29,8 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest]
         java: [
-          { 'version': '11' },
-          { 'version': '17' }
+          { 'version': '17' },
+          { 'version': '21' }
         ]
     steps:
       - name: Prepare git
@@ -55,8 +55,8 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest]
         java: [
-          { 'version': '11' },
-          { 'version': '17' }
+          { 'version': '17' },
+          { 'version': '21' }
         ]
     steps:
       - name: Prepare git

.github/workflows/codeql.yml

@@ -30,7 +30,7 @@ jobs:
         uses: actions/setup-java@v4
         with:
           distribution: temurin
-          java-version: 11
+          java-version: 17
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v3

.github/workflows/release.yml

@@ -29,11 +29,11 @@ jobs:
           gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
           passphrase: ${{ secrets.GPG_PASSPHRASE }}
 
-      - name: Set up JDK 11
+      - name: Set up JDK 17
         uses: actions/setup-java@v4
         with:
           distribution: temurin
-          java-version: 11
+          java-version: 17
 
       - name: Cache local Maven repository
         uses: actions/cache@v4

.lgtm.yml

@@ -8,4 +8,4 @@ extraction:
       maven:
         version: "3.8.4"
       # Specify the Java version required to build the project
-      java_version: "11"
+      java_version: "17"

README.md

@@ -10,6 +10,8 @@
 
 > **⚠️** This is the instructions for the latest SNAPSHOT version (main branch). Please, see the [latest **released** documentation](https://github.com/quarkiverse/quarkus-openapi-generator/blob/1.0.1/README.md) if you are looking for instructions.
 
+> **⚠️** This extension, [like Quarkus 3.7](https://quarkus.io/blog/java-17/), requires Java 17. The last version of this extension that supports earlier versions of Java is [2.2.16](https://github.com/quarkiverse/quarkus-openapi-generator/releases/tag/2.2.16).
+
 > **⚠️** Check versions 1.x.x if you're still using Quarkus 2. But be aware that we no longer support Quarkus 2. That means there are no updates planned for those versions.
 
 Quarkus' extension for generation of [Rest Clients](https://quarkus.io/guides/rest-client) based on OpenAPI specification files.

pom.xml

@@ -25,7 +25,7 @@
   </scm>
   <properties>
     <compiler-plugin.version>3.8.1</compiler-plugin.version>
-    <maven.compiler.release>11</maven.compiler.release>
+    <maven.compiler.release>17</maven.compiler.release>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <quarkus.version>3.6.7</quarkus.version>