Update phpseclib to 2.0.0

[jblanchon]

Hello,
I want to add google/google-api-php-client (https://github.com/google/google-api-php-client)
I have an issue while requiring this bundle because your bundle needs
"phpseclib/phpseclib": "~1.0"
And the google api-client require "phpseclib/phpseclib": "~2.0"

Is it possible to update your bundle with the new version of phpseclib ?

Thank you,

[tristanbes]

for information, this PR fix this ticket #72

[cirpo]

@jblanchon @tristanbes the 6.1.0 version fixes the issue, thanks