Update README.md

Author: andrebreves

README.md

@@ -11,7 +11,7 @@ Add to ```pom.xml```:
     <dependency>
         <groupId>com.andrebreves</groupId>
         <artifactId>java-tuple</artifactId>
-        <version>1.1.0</version>
+        <version>1.2.0</version>
     </dependency>
 </dependencies>
 ```
@@ -25,6 +25,11 @@ Tuple2<String, String> tuple = Tuple.of("v01", "v02");
 System.out.println(tuple.v1()); // "v01"
 System.out.println(tuple.v2()); // "v02"
 
+Tuple3<String, String, String> newTuple = tuple.concat("v03");
+System.out.println(newTuple.v1()); // "v01"
+System.out.println(newTuple.v2()); // "v02"
+System.out.println(newTuple.v3()); // "v03"
+
 List<Tuple3<String, Integer, String>> tuples = Arrays.asList(
     Tuple.of("v10", 11, "v12"),
     Tuple.of("v20", 21, "v22"),
@@ -36,12 +41,17 @@ tuples.stream()
     .forEachOrdered(System.out::print); // "v12v22v32"
 ```
 
-Java 10:
+Java 10 and up:
 ```java
 var tuple = Tuple.of("v01", "v02");
 System.out.println(tuple.v1()); // "v01"
 System.out.println(tuple.v2()); // "v02"
 
+var newTuple = tuple.concat("v03");
+System.out.println(newTuple.v1()); // "v01"
+System.out.println(newTuple.v2()); // "v02"
+System.out.println(newTuple.v3()); // "v03"
+
 var tuples = List.of(
     Tuple.of("v10", 11, "v12"),
     Tuple.of("v20", 21, "v22"),