Updated the pom.xml to use the lastest versions of maven plugins and tools.
Updated the pom.xml to use the lastest versions of maven plugins and
tools.

Signed-off-by: Tatiana Leon <8c4753e861fecbb16ba9ebac0b105a2d4612071d@digi.com>
digidotcom/XBeeJavaLibrary,GUBotDev/XBeeJavaLibrary,brucetsao/XBeeJavaLibrary