Flask-simpleldap

Add Flask 3.x compatibility and the following:

PRs:
- 100
- 87
- 86
- 84
- 76
- 73
- 72
- 71
- 67
- 59

Fix:
- 96

This release drops support for [Python 2.7](https://pythonclock.org/). If you're still on Python 2.7, you can use [v1.3.3](https://github.com/admiralobvious/flask-simpleldap/releases/tag/v1.3.3).

Fixes:
- [62](https://github.com/admiralobvious/flask-simpleldap/issues/62) get_object_details returning None

This release backports 9a81914 to 1.3.x to 62 for Python 2.7 users.

Update setup.py to use python-ldap>=3.0.0 which has support for Python 3.x.

Thanks to the contributors, this release fixes issues related to `bind_user` and fixes some issues related to filtering.

- 51 Referral chasing crash
- 54 Fixes 44 - Error in bind_user method, also fixes 60 and 61
- 56 OpenLDAP section has Incorrect LDAP_GROUP_OBJECT_FILTER
- 57 next vaule: Priority use request.full_path
- 59 get_object_details to take query_filter and fallback to LDAP_USER_OBJECT_FILTER or LDAP_GROUP_OBJECT_FILTER