Annotate Try#mapFailure with @SafeVarargs (#2863)

src/main/java/io/vavr/control/Try.java

@@ -723,7 +723,8 @@ public final <U> Try<U> map(Function<? super T, ? extends U> mapper) {
      * @param cases A not necessarily exhaustive sequence of cases that will be matched against a cause.
      * @return A new {@code Try} if this is a {@code Failure}, otherwise this.
      */
-    @SuppressWarnings({ "unchecked", "varargs" })
+    @SuppressWarnings({"varargs"})
+    @SafeVarargs
     public final Try<T> mapFailure(Match.Case<? extends Throwable, ? extends Throwable>... cases) {
         if (isSuccess()) {
             return this;