The 'ldap' provider misses 'ldap' extra dep (which adds ldap3 pip dependency).
setup.py
]
presto = ['presto-python-client>=0.7.0,<0.8']
qubole = [
    'qds-sdk>=1.10.4',
]
rabbitmq = [
    'amqp<5.0.0',
]
redis = [
    'redis~=3.2',
]
salesforce = [
    'simple-salesforce>=1.0.0',
]
samba = [
    'pysmbclient>=0.1.3',
]
segment = [
    'analytics-python>=1.2.9',
]
sendgrid = [
    'sendgrid>=6.0.0,<7',
]
sentry = [
    'blinker>=1.1',
    'sentry-sdk>=0.8.0',
]
singularity = ['spython>=0.0.56']
slack = [
    'slackclient>=2.0.0,<3.0.0',