fix: revert removal of Jabel (for support of Java 11)

build.gradle

@@ -19,6 +19,8 @@ repositories {
 }
 
 dependencies {
+    annotationProcessor 'com.github.bsideup.jabel:jabel-javac-plugin:0.4.2'
+    compileOnly 'com.github.bsideup.jabel:jabel-javac-plugin:0.4.2'
     testImplementation 'org.junit.jupiter:junit-jupiter:5.9.2'
     testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
 }
@@ -32,6 +34,10 @@ java {
     }
 }
 
+configure([tasks.compileJava]) {
+    options.release = 11
+}
+
 jar {
     manifest {
         attributes(