Add duplicate_to_end parameter

[cschloer]

Following the PR here: https://github.com/datahq/dataflows/pull/156

[cschloer]

@roll

[akariv]

Looks good - just need to also bump dataflows version when it's released.

[cschloer]

Dataflows version bumped!

[coveralls]

Pull Request Test Coverage Report for Build 1172

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage remained the same at 17.098%

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Files with Coverage Reduction	New Missed Lines	%
.tox/py37-plyvel/lib/python3.7/site-packages/datapackage_pipelines/lib/duplicate.py	1	0%
.tox/py37-sqlite/lib/python3.7/site-packages/datapackage_pipelines/lib/duplicate.py	1	0%
<!--	Total:	2		-->

Totals
Change from base Build 1166:	0.0%
Covered Lines:	1737
Relevant Lines:	10159

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💛 - Coveralls

[cschloer]

Bumping this @akariv

[akariv]

Sorry for the delay

[akariv]

https://pypi.org/project/datapackage-pipelines/2.2.6/

[cschloer]

no worries for the delay! Thanks for the merge.