Hotfix/update file saver module

[elquimeras]

🤔 Problem

• FileSaver.js package was outdated from Teleborder repository

bower file-saver.js#~1.20150507.2                      
ECMDERR Failed to execute "git ls-remote --tags --heads https://github.com/Teleborder/FileSaver.js.git", exit code of #128 remote: Repository not found. fatal: repository 'https://github.com/Teleborder/FileSaver.js.git/' not found

✅ Solution

• Update FileSaver to latest version and use the new npm location https://github.com/eligrey/FileSaver.js

Disclaimer

• A pull request was open in the original repo but is still in review, the repo could be abandoned
  Hotfix/update file saver module alferov/angular-file-saver#49