Update maven version in readme
Update maven version in readme

Add link to maven jars
aniket-21/java-client,saikrishna321/java-client,appium/java-client,kostechko/java-client,YOU-i-Labs/appium-java-client,rafael-chavez/java-client,SrinivasanTarget/java-client,rafael-chavez/java-client,Jonahss/java-client,d0lfin/java-client,TikhomirovSergey/java-client,SrinivasanTarget/java-client,appium/java-client,wmruk/java-client,rafael-chavez/java-client,saikrishna321/java-client,SrinivasanTarget/java-client,tobecrazy/java-client,TikhomirovSergey/java-client,tobecrazy/java-client,YOU-i-Labs/appium-java-client,tobecrazy/java-client,TikhomirovSergey/java-client,SrinivasanTarget/java-client,SouWilliams/java-client,TikhomirovSergey/java-client,YOU-i-Labs/appium-java-client,tobecrazy/java-client,saikrishna321/java-client,YOU-i-Labs/appium-java-client,saikrishna321/java-client,eliasnogueira/java-client,rafael-chavez/java-client