(fix) rustup: feature gate update
(fix) rustup: feature gate update

wang19742008/handlebars-rust,sunng87/handlebars-rust,tailhook/handlebars-rust,tempbottle/handlebars-rust,tailhook/handlebars-rust,tempbottle/handlebars-rust,ihrwein/handlebars-rust,sunng87/handlebars-rust