Ecosystem support

[hasufell]

• Support filepath >= 1.5.0.0 and os-string unix#305
• Support filepath >= 1.5.0.0 and os-string win32#222
  • Support filepath >= 1.5.0.0 and os-string, fixes #222 win32#226
• Support filepath >= 1.5.0.0 and os-string directory#164
  • Support filepath >= 1.5.0.0 and os-string, fixes #164 directory#165