composer.lock: Fix Texy dependency version (2.2.0 -> 2.2).
composer.lock: Fix Texy dependency version (2.2.0 -> 2.2).

It looks like Texy deleted the "v2.2.0" tag from their repo.  Not cool.

itsazzad/dropbox-sdk-php,demisang/dropbox-sdk-php,itsazzad/dropbox-sdk-php,sayfulit/dropbox-sdk-php,sayfulit/dropbox-sdk-php,dropbox/dropbox-sdk-php,dropbox/dropbox-sdk-php,demisang/dropbox-sdk-php,TimeDoctorLLC/dropbox-sdk-php,TimeDoctorLLC/dropbox-sdk-php