Revert back to JDK 8

Author: smaye81

build.gradle.kts

@@ -14,8 +14,8 @@ plugins {
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
 }
 
 // The releaseVersion property is set on official releases in the release.yml workflow.
@@ -141,7 +141,7 @@ tasks.withType<JavaCompile> {
     dependsOn("generateTestSources")
     if (JavaVersion.current().isJava9Compatible) {
         doFirst {
-            options.compilerArgs = mutableListOf("--release", "11")
+            options.compilerArgs = mutableListOf("--release", "8")
         }
     }
     // Disable errorprone on generated code
@@ -271,6 +271,7 @@ dependencies {
     implementation(enforcedPlatform(libs.cel))
     implementation(libs.cel.core)
     implementation(libs.guava)
+    implementation(libs.ipaddress)
 
     buf("build.buf:buf:${libs.versions.buf.get()}:${osdetector.classifier}@exe")