MIME4J-289 Upgrade common-logging 1.1.1 -> 1.2

pom.xml

@@ -69,7 +69,7 @@
         <james-skin.version>1.8</james-skin.version>
 
         <target.jdk>1.8</target.jdk>
-        <commons-logging.version>1.1.1</commons-logging.version>
+        <commons-logging.version>1.2</commons-logging.version>
         <log4j.version>1.2.14</log4j.version>
         <junit.version>4.10</junit.version>
         <mockito.version>1.9.5</mockito.version>