Release v.1.3.9

What's Changed

• Open urls with exe (for Windows) by @PhilipK in #146
• Steamline how auth_key input is assigned by @PhilipK in #147
• Fix not finding certain GOG games that use launchers by @Untz64 in #149
• Launch games through heroic launcher by @PhilipK in #151

New Contributors

• @Untz64 made their first contribution in #149

Full Changelog: v.1.3.8...v.1.3.9