Neil Gelder notes that you can deploy different versions of SSIS packages using Visual Studio 2015:
For years I’ve dream’t of having one set of tools for developing SSIS packages! not a lot to ask really and great step towards this from Microsoft was decoupling the development IDE from the main SQL Server install to produce the standalone SSDT (SQL Server data tools)
But like most people I work in an environment which has legacy versions for SQL Server in production, but equally like most tech folk (giddy kids wanting new toys) I always try and use the most current and exciting version of VS. This however proves a problem when developing for SSIS, for example if you developed a SSIS package in VS 2013 you’d not be able to deploy this correctly to a SQL Server 2012 version of Integration services catalog. In the past this resulted in having two IDE’s installed, SSDT 2012 (VS shell) for any 2012 catalog development and VS 2013 installed for other work.
I had one person mention during a talk I gave that this isn’t foolproof, but my experience (limited to SQL Server 2012 and 2014) was that deployment worked fine. As always, test before making changes.