This question mentions two libraries, both of which aren't maintained and one has broken links to the source and documentation.
SSISUnit was last updated in 2008 and SSIStester has broken links in the documentation and hasn't been updated since 2013.
The answers on social.msdn.microsoft.com also generally point to one of those two libraries, or some sort of custom solution.
Are there any other options?
2018-10-09 Bounty Update
Is there any updates that are related to newer versions of SSIS (2015+)?
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