v0.9.0

• Fix wrong executable path when the script name matches the name of a dependency (#8).
  • Note that rust-script --clear-cache needs to be called once after upgrading to clean out incorrectly cached paths.
• Allow ? to be used in script file without fn main().
  • This is done by letting the return type of the generated main() function be Result<(), Box<dyn std::error::Error+Sync+Send>>.