Updated select2.js with latest version 3.4.2 to 3.4.8:
- When any of the duplicated options are selected, the values are not being cleared(in 3.4.2) after removing them, working in 3.4.8
Merge pull request #110 from bhaskar8088/master

Updated select2.js with latest version 3.4.2 to 3.4.8: