0.12.0

• Add title support for WASM (#132 Thanks to @Easyoakland)
• Add Create folder button to pick_folder on macOS (#127 Thanks to @bancek)
• Add support for Yes/No/Cancel buttons (#123 Thanks to @Adanos020)
• Change a string method signatures (#117 Thanks to @somedevfox)
• WASM save_file (#134 Thanks to @Easyoakland)
• Update gtk-sys to 0.18 (#143)
• Update ashpd to 0.6 (#133 Thanks to @bilelmoussaoui)
• Replace windows with windows-sys (#118 @Jake-Shadle)
• Make zenity related deps optional (#141)