Remove use of deprecated proc_macro_hack

This fixes the error:
"unresolved macro `$crate::proc_macro_call_dodrio!`" from the file
examples/dodrio/counter/src/lib.rs.

Quoting proc_macro_hack documentation:
> Note: As of Rust 1.45 this crate is superseded by native support for
> #[proc_macro] in expression position. Only consider using this crate
> if you care about supporting compilers between 1.31 and 1.45.

Source: https://docs.rs/proc-macro-hack/latest/proc_macro_hack/index.html

macros/Cargo.toml

@@ -19,7 +19,6 @@ proc-macro = true
 lalrpop-util = "0.18"
 ansi_term = "0.12.0"
 proc-macro2 = { version = "1.0.4", features = ["nightly"] }
-proc-macro-hack = "0.5.2"
 quote = "1.0.2"
 
 [build-dependencies]

macros/src/lib.rs

@@ -4,7 +4,6 @@
 extern crate proc_macro;
 
 use proc_macro::TokenStream;
-use proc_macro_hack::proc_macro_hack;
 
 mod config;
 mod declare;
@@ -21,7 +20,7 @@ mod span;
 /// See the crate documentation for [`typed_html`][typed_html].
 ///
 /// [typed_html]: ../typed_html/index.html
-#[proc_macro_hack]
+#[proc_macro]
 pub fn html(input: TokenStream) -> TokenStream {
     let stream = lexer::unroll_stream(input.into(), false);
     let result = html::expand_html(&stream);
@@ -40,7 +39,7 @@ pub fn html(input: TokenStream) -> TokenStream {
 ///
 /// [typed_html]: ../typed_html/index.html
 #[cfg(feature = "dodrio")]
-#[proc_macro_hack]
+#[proc_macro]
 pub fn dodrio(input: TokenStream) -> TokenStream {
     let stream = lexer::unroll_stream(input.into(), false);
     let result = html::expand_dodrio(&stream);

typed-html/Cargo.toml

@@ -25,7 +25,6 @@ strum_macros = "0.18"
 mime = "0.3.13"
 language-tags = "0.2.2"
 htmlescape = "0.3.1"
-proc-macro-hack = "0.5.4"
 proc-macro-nested = "0.1.3"
 stdweb = { version = "0.4.14", optional = true }
 dodrio = { version = "0.2.0", optional = true }

typed-html/src/elements.rs

@@ -2,11 +2,10 @@
 
 #![allow(non_camel_case_types)]
 
-use typed_html_macros::declare_elements;
-
-use crate::OutputType;
 use crate::dom::{Node, TextNode};
 use crate::types::*;
+use crate::OutputType;
+use typed_html_macros::declare_elements;
 
 // Marker traits for element content groups
 
@@ -18,7 +17,10 @@ macro_rules! marker_trait {
     ($trait:ident, $parent:ident) => {
         pub trait $trait<T: OutputType + Send>: $parent<T> {}
 
-        impl<T> IntoIterator for Box<dyn $trait<T>> where T: OutputType + Send {
+        impl<T> IntoIterator for Box<dyn $trait<T>>
+        where
+            T: OutputType + Send,
+        {
             type Item = Box<dyn $trait<T>>;
             type IntoIter = std::vec::IntoIter<Box<dyn $trait<T>>>;
 
@@ -48,7 +50,7 @@ marker_trait!(SelectContent);
 marker_trait!(TableContent);
 marker_trait!(TableColumnContent);
 
-declare_elements!{
+declare_elements! {
     html {
         xmlns: Uri,
     } with [head, body];
@@ -451,7 +453,7 @@ declare_elements!{
 #[test]
 fn test_data_attributes() {
     use crate as typed_html;
-    use crate::dom::DOMTree;
+    use crate::{dom::DOMTree, html};
 
     let frag: DOMTree<String> = html!(<div data-id="1234">"Boo!"</div>);
 

typed-html/src/lib.rs

@@ -195,14 +195,11 @@
 
 pub extern crate htmlescape;
 
-use proc_macro_hack::proc_macro_hack;
 use std::fmt::Display;
 
-#[proc_macro_hack(support_nested)]
 pub use typed_html_macros::html;
 
 #[cfg(feature = "dodrio_macro")]
-#[proc_macro_hack(support_nested)]
 pub use typed_html_macros::dodrio;
 
 pub mod dom;