Update version to the 1.1.

Author: javadev

pom-central.xml

@@ -5,7 +5,7 @@
   <groupId>com.github.javadev</groupId>
   <artifactId>calc</artifactId>
   <packaging>jar</packaging>
-  <version>1.0</version>
+  <version>1.1</version>
   <name>Swing calculator application</name>
   <description>The swing calculator application</description>
   <url>https://github.com/javadev/calc</url>