Ldap3-ad-leavers

- Fixed search vulnerabilities
- Added GNU license
- Improved error messages

What's Changed
* - Improved performance of filtering eligible users by mervinhemaraju in https://github.com/mervinhemaraju/ldap3-ad-leavers/pull/2
- Fixed some issues

**Full Changelog**: https://github.com/mervinhemaraju/ldap3-ad-leavers/compare/1.0.0...1.1.2

What's Changed
* - Improved performance of filtering eligible users by mervinhemaraju in https://github.com/mervinhemaraju/ldap3-ad-leavers/pull/2
* - Added attribute is_disabled to the User class to determine if a user object is disabled mervinhemaraju in https://github.com/mervinhemaraju/ldap3-ad-leavers/pull/2


**Full Changelog**: https://github.com/mervinhemaraju/ldap3-ad-leavers/compare/1.0.0...1.1.0

- Connect to ldap3 using the UserOps class
- UserOps models a User in AD

Ability to:
- Set expiration on User objects
- Ability to disable user objects
- Ability to move user objects
- Ability to search user objects
- Ability to deep search a user object