Revert "Bump quote to 0.4"

This reverts commit 6899c275ee0ab0687ec66c490ddd1a76f8223513.

The `proc_macro2` crate depends on rustc internal crates, which means that
`bindgen` would need to be run under `rustup`.

We can follow https://github.com/rust-lang/rust/issues/47931 to get updates on
when this issue might be resolved and we can update `quote` again.

Fixes #1248

1 files changed, 2 insertions, 3 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 9874b5dd..81494cc6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -23,7 +23,6 @@ extern crate lazy_static;
 extern crate peeking_take_while;
 #[macro_use]
 extern crate quote;
-extern crate proc_macro2;
 extern crate regex;
 extern crate which;
 
@@ -1693,7 +1692,7 @@ impl Bindings {
             writer.write("\n".as_bytes())?;
         }
 
-        let bindings = self.module.to_string();
+        let bindings = self.module.as_str().to_string();
 
         match self.rustfmt_generated_string(&bindings) {
             Ok(rustfmt_bindings) => {
@@ -1701,7 +1700,7 @@ impl Bindings {
             },
             Err(err) => {
                 eprintln!("{:?}", err);
-                writer.write(bindings.as_bytes())?;
+                writer.write(bindings.as_str().as_bytes())?;
             },
         }
         Ok(())