v1.3.1: Export version in package

This patch exports the version as a constant appstractionVersion in the module, to address problems raised in (among others) tweaselORG/cyanoacrylate#50.

What's Changed

• Towards tweaselORG/cyanoacrylate#50: Print version into file to export by @zner0L in #136

Full Changelog: v1.3.0...v1.3.1