Fix autocompletion in html macro for rust-analyzer (#3829)

Author: mohe2015

packages/yew-macro/src/html_tree/html_node.rs

@@ -3,15 +3,15 @@ use quote::{quote, quote_spanned, ToTokens};
 use syn::buffer::Cursor;
 use syn::parse::{Parse, ParseStream, Result};
 use syn::spanned::Spanned;
-use syn::{Expr, Lit};
+use syn::Lit;
 
 use super::ToNodeIterator;
 use crate::stringify::Stringify;
 use crate::PeekValue;
 
 pub enum HtmlNode {
     Literal(Box<Lit>),
-    Expression(Box<Expr>),
+    Expression(Box<TokenStream>),
 }
 
 impl Parse for HtmlNode {

packages/yew-macro/src/html_tree/mod.rs

@@ -247,7 +247,7 @@ impl HtmlChildrenTree {
                 .iter()
                 .map(|child| quote_spanned! {child.span()=> ::std::convert::Into::into(#child) });
             return quote! {
-                ::std::vec![#(#children_into),*]
+                [#(#children_into),*].to_vec()
             };
         }