Development - Including Reject Option in Unsupervised Anomaly Detection

[Lorenzo-Perini]

All Submissions Basics:

• [Yes] Have you followed the guidelines in our Contributing document?
• [Yes] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• [Yes] Have you checked all Issues to tie the PR to a specific one?

All Submissions Cores:

• [Yes] Have you added an explanation of what your changes do and why you'd like us to include them?
• [Yes] Have you written new tests for your core changes, as applicable?
• [Yes] Have you successfully ran tests with your changes locally?
• [Yes] Does your submission pass tests, including CircleCI, Travis CI, and AppVeyor?
• [Yes] Does your submission have appropriate code coverage? The cutoff threshold is 95% by Coversall.

[coveralls]

Pull Request Test Coverage Report for Build 10722250699

Details

• 452 of 459 (98.47%) changed or added relevant lines in 42 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 95.353%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pyod/models/base.py	42	49	85.71%

Totals
Change from base Build 10046360309:	0.1%
Covered Lines:	10341
Relevant Lines:	10845

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💛 - Coveralls