Release 0.2.20

This release fixes an issue from the zipper dependency library, where zero sized files would have been extracted as directories, rather than files.

What's Changed

• fix paths in CMakeLists.txt when including zipper sources from the submodule by @lkeegan in #53
• fix minizip cmake paths by @lkeegan in #54
• fixes #59

New Contributors

• @lkeegan made their first contribution in #53

Full Changelog: v0.2.19...v0.2.20