generator: Upgrade bindgen, heck and vk-parse

`heck` got its API slightly renamed, and `bindgen` fixed all code-smell
linter warnings in its output (except naming style, which is inherent).

ash/src/vk.rs

@@ -28,8 +28,6 @@ mod prelude;
 pub use prelude::*;
 /// Native bindings from Vulkan headers, generated by bindgen
 #[allow(nonstandard_style)]
-#[allow(deref_nullptr)]
-#[allow(trivial_casts, trivial_numeric_casts)]
 pub mod native;
 mod platform_types;
 pub use platform_types::*;

generator/Cargo.toml

@@ -5,15 +5,15 @@ authors = ["Maik Klein <maikklein@googlemail.com>"]
 edition = "2018"
 
 [dependencies]
-bindgen = "0.58"
-heck = "0.3"
+bindgen = "0.60"
+heck = "0.4"
 itertools = "0.10"
 nom = "7.1"
 once_cell = "1.7"
 proc-macro2 = "1.0"
 quote = "1.0"
 regex = "1.4"
-vk-parse = { version = "0.6", features = ["vkxml-convert"] }
+vk-parse = { version = "0.7", features = ["vkxml-convert"] }
 vkxml = "0.3"
 
 [dependencies.syn]

generator/src/lib.rs

@@ -1,7 +1,7 @@
 #![recursion_limit = "256"]
 #![warn(trivial_casts, trivial_numeric_casts)]
 
-use heck::{CamelCase, ShoutySnakeCase, SnakeCase};
+use heck::{ToShoutySnakeCase, ToSnakeCase, ToUpperCamelCase};
 use itertools::Itertools;
 use nom::sequence::pair;
 use nom::{
@@ -1006,7 +1006,10 @@ pub fn generate_extension_commands<'a>(
 
     let ident = format_ident!(
         "{}Fn",
-        extension_name.to_camel_case().strip_prefix("Vk").unwrap()
+        extension_name
+            .to_upper_camel_case()
+            .strip_prefix("Vk")
+            .unwrap()
     );
     let fp = generate_function_pointers(ident.clone(), &commands, &aliases, fn_cache);