Bump Context to JDK 8

Author: carl-mastrangelo

api/build.gradle

@@ -17,13 +17,13 @@ sourceSets {
 }
 
 tasks.named("compileContextJava").configure {
-    if (JavaVersion.current().isCompatibleWith(JavaVersion.VERSION_20)) {
-        println("!!! Javac does not support generating Java 7 bytecode. Do not use for release builds !!!")
+    if (JavaVersion.current().isCompatibleWith(JavaVersion.VERSION_26)) {
+        println("!!! Javac does not support generating Java 8 bytecode. Do not use for release builds !!!")
     } else if (JavaVersion.current().isJava9Compatible()) {
-        options.release = 7
+        options.release = 8
     } else {
-        sourceCompatibility = JavaVersion.VERSION_1_7
-        targetCompatibility = JavaVersion.VERSION_1_7
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
     }
 }