group by map factory test and javadoc should use latest guava 24.0-jr…

…e, set since to 2.1.10

build.gradle

@@ -56,7 +56,7 @@ def reactiveStreamsVersion = "1.0.2"
 def mockitoVersion = "2.1.0"
 def jmhLibVersion = "1.19"
 def testNgVersion = "6.11"
-def guavaVersion = "19.0"
+def guavaVersion = "24.0-jre"
 // --------------------------------------
 
 repositories {

src/main/java/io/reactivex/Flowable.java

@@ -9729,7 +9729,7 @@ public final <K, V> Flowable<GroupedFlowable<K, V>> groupBy(Function<? super T,
      * 
      * <p>The map created by an {@code evictingMapFactory} must be thread-safe.
      * 
-     * <p>An example of an {@code evictingMapFactory} using <a href="https://google.github.io/guava/releases/19.0/api/docs/com/google/common/cache/CacheBuilder.html">CacheBuilder</a> from the Guava library is below:
+     * <p>An example of an {@code evictingMapFactory} using <a href="https://google.github.io/guava/releases/24.0-jre/api/docs/com/google/common/cache/CacheBuilder.html">CacheBuilder</a> from the Guava library is below:
      * 
      * <pre>
      * Function&lt;Consumer&lt;Object&gt;, Map&lt;Integer, Object&gt;&gt; evictingMapFactory = 
@@ -9789,7 +9789,7 @@ public final <K, V> Flowable<GroupedFlowable<K, V>> groupBy(Function<? super T,
      *            The factory used to create a map that will be used by the implementation to hold the 
      *            {@link GroupedFlowable}s. The evicting map created by this factory must
      *            notify the provided {@code Consumer<Object>} with the entry value (not the key!) when
-     *            an entry in this map has been evicted.. The next source emission will bring about the
+     *            an entry in this map has been evicted. The next source emission will bring about the
      *            completion of the evicted {@link GroupedFlowable}s. See example above.
      * @param <K>
      *            the key type
@@ -9800,7 +9800,7 @@ public final <K, V> Flowable<GroupedFlowable<K, V>> groupBy(Function<? super T,
      *         key value
      * @see <a href="http://reactivex.io/documentation/operators/groupby.html">ReactiveX operators documentation: GroupBy</a>
      *
-     * @since 2.1.11
+     * @since 2.1.10
      */
     @CheckReturnValue
     @BackpressureSupport(BackpressureKind.FULL)