Version 0.3.0 build fails becase From<TokenSteam> not implmented for syn::Expr

[Ritoban Roy-Chowdhury]

When compiling em = "0.3.0", I get the following error from Cargo on 5.4.7-arch1-1.

error[E0277]: the trait bound `syn::Expr: std::convert::From<quote::__rt::TokenStream>` is not satisfied
   --> /home/ritoban/.cargo/registry/src/github.com-1ecc6299db9ec823/emu_macro-0.1.0/src/passing.rs:338:38
    |
338 |                     i.args.insert(0, gpu_ident);
    |                                      ^^^^^^^^^ the trait `std::convert::From<quote::__rt::TokenStream>` is not implemented for `syn::Expr`
    |
    = help: the following implementations were found:
              <syn::Expr as std::convert::From<syn::ExprArray>>
              <syn::Expr as std::convert::From<syn::ExprAssign>>
              <syn::Expr as std::convert::From<syn::ExprAssignOp>>
              <syn::Expr as std::convert::From<syn::ExprAsync>>
            and 35 others
    = note: required because of the requirements on the impl of `std::convert::Into<syn::Expr>` for `quote::__rt::TokenStream`