Fix compile on latest nightly (#489)

Author: alexcrichton

README.md

@@ -20,7 +20,7 @@ Import JavaScript things into Rust and export Rust things to JavaScript.
 `src/lib.rs`:
 
 ```rust
-#![feature(proc_macro, wasm_custom_section, wasm_import_module)]
+#![feature(use_extern_macros, wasm_custom_section, wasm_import_module)]
 
 extern crate wasm_bindgen;
 use wasm_bindgen::prelude::*;

crates/backend/Cargo.toml

@@ -16,7 +16,7 @@ extra-traits = ["syn/extra-traits"]
 
 [dependencies]
 quote = '0.6'
-proc-macro2 = "0.4"
+proc-macro2 = "0.4.8"
 wasm-bindgen-shared = { path = "../shared", version = "=0.2.11" }
 syn = { version = '0.14', features = ['full', 'visit-mut'] }
 serde_json = "1.0"

crates/macro/Cargo.toml

@@ -20,6 +20,6 @@ xxx_debug_only_print_generated_code = []
 [dependencies]
 syn = { version = '0.14', features = ['full'] }
 quote = '0.6'
-proc-macro2 = "0.4.4"
+proc-macro2 = "0.4.8"
 wasm-bindgen-backend = { path = "../backend", version = "=0.2.11" }
 wasm-bindgen-shared = { path = "../shared", version = "=0.2.11" }

crates/macro/src/lib.rs

@@ -1,5 +1,3 @@
-#![feature(proc_macro)]
-
 extern crate proc_macro;
 extern crate proc_macro2;
 extern crate quote;

crates/typescript/Cargo.toml

@@ -8,8 +8,8 @@ serde = "1.0"
 serde_derive = "1.0"
 serde_json = "1.0"
 
-proc-macro2 = "0.4"
+proc-macro2 = "0.4.8"
 quote = "0.6"
-syn = { version = "0.14", default-features = false } 
-wasm-bindgen = { path = "../..", default-features = false } 
-wasm-bindgen-backend = { path = "../backend", default-features = false } 
+syn = { version = "0.14", default-features = false }
+wasm-bindgen = { path = "../..", default-features = false }
+wasm-bindgen-backend = { path = "../backend", default-features = false }

crates/web-sys/tests/all/event.rs

@@ -6,7 +6,7 @@ fn event() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(proc_macro, wasm_custom_section)]
+                #![feature(use_extern_macros, wasm_custom_section)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
                 extern crate web_sys;

crates/web-sys/tests/all/headers.rs

@@ -6,7 +6,7 @@ fn headers() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(proc_macro, wasm_custom_section)]
+                #![feature(use_extern_macros, wasm_custom_section)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
                 extern crate web_sys;

crates/web-sys/tests/all/response.rs

@@ -6,7 +6,7 @@ fn response() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(proc_macro, wasm_custom_section)]
+                #![feature(use_extern_macros, wasm_custom_section)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
                 extern crate web_sys;

crates/webidl/Cargo.toml

@@ -10,7 +10,7 @@ wasm-bindgen-test-project-builder = { path = "../test-project-builder", version
 failure = "0.1"
 heck = "0.3"
 log = "0.4.1"
-proc-macro2 = "0.4"
+proc-macro2 = "0.4.8"
 quote = '0.6'
 syn = { version = '0.14', features = ['full'] }
 wasm-bindgen-backend = { version = "=0.2.11", path = "../backend" }

crates/webidl/tests/all/consts.rs

@@ -24,7 +24,7 @@ fn bool() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(proc_macro, wasm_custom_section, wasm_import_module)]
+                #![feature(use_extern_macros, wasm_custom_section, wasm_import_module)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
@@ -93,7 +93,7 @@ fn ints() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(proc_macro, wasm_custom_section, wasm_import_module)]
+                #![feature(use_extern_macros, wasm_custom_section, wasm_import_module)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;
 
@@ -160,7 +160,7 @@ fn floats() {
         .file(
             "src/lib.rs",
             r#"
-                #![feature(proc_macro, wasm_custom_section, wasm_import_module)]
+                #![feature(use_extern_macros, wasm_custom_section, wasm_import_module)]
                 extern crate wasm_bindgen;
                 use wasm_bindgen::prelude::*;