2.7.9

Added

luigi.contrib:

• Added optional choice for hdfs clients (#2487)
• s3client check for deprecated host keyword and raise error with the details (#2493)
• Add a "capture_output" parameter to ExternalProgramTask (#2430)

Fixed

luigi:

• Fix exception when toml lib is not installed (#2506)
• Replace direct attribute accessing by using built-n function getattr (#2509)
• set upper bound of python-daemon (#2536)

luigi.contrib:

• Fix S3Client.copy return value consistency (#2488)
• Update MockTarget mode to accept r* or w* (#2519)