Various fixes & improvements
- fix: Use forward slash for Windows binary location path (1369) by timfish
- fix: Add + to reserved query characters in url encoding (1365) by kamilogorek
- feat: Add `headers` option to the JavaScript API (1355) by thibmeu
- fix: Add % and / to reserved path characters in url encoding (1364) by kamilogorek
- feat: Add support for Portable PDB debug files (1345) by Swatinem