More Java 8 compiler fixes

jOOQ/src/main/java/org/jooq/impl/R2DBC.java

@@ -688,7 +688,7 @@ final class R2DBC {
 
         @Override
         ConnectionSubscriber<T> delegate() {
-            return new ConnectionSubscriber<>(this) {
+            return new ConnectionSubscriber<T>(this) {
                 @Override
                 void onNext0(Connection c) {
                     c.beginTransaction().subscribe(subscriber(

jOOQ/src/main/java/org/jooq/impl/Tools.java

@@ -6372,7 +6372,7 @@ final class Tools {
     }
 
     static final <T> Supplier<T> cached(Supplier<T> s) {
-        return new Supplier<>() {
+        return new Supplier<T>() {
 
             // The assumption is that race conditions for the assignment are
             // acceptable because the computation is idempotent, so memory