feat: remove feature gate to compile in stable rust

Author: zimond

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fontkit"
-version = "0.4.5"
+version = "0.4.6"
 edition = "2021"
 authors = ["Zimon Dai <[email protected]>"]
 description = "A simple library for font loading and indexing"

rust-toolchain

@@ -1,5 +1,3 @@
-#![feature(doc_auto_cfg)]
-
 #[cfg(not(wasm))]
 use std::cell::RefCell;
 #[cfg(not(dashmap))]

src/lib.rs

@@ -15,10 +15,11 @@ pub fn test_font_loading() -> Result<(), Error> {
 #[test]
 pub fn test_variable_font_loading() -> Result<(), Error> {
     let mut buf = vec![];
-    let mut f = fs::File::open("examples/AlimamaFangYuanTiVF.ttf")?;
+    let mut f = fs::File::open("examples/AlimamaFangYuanTiVF-VF-HVAR.woff2")?;
     f.read_to_end(&mut buf)?;
     let fontkit = fontkit::FontKit::new();
     let _ = fontkit.add_font_from_buffer(buf)?;
+    println!("{:?}", fontkit.font_keys().collect::<Vec<_>>());
     let mut key = FontKey::default();
     key.family = "AlimamaFangYuanTiVF-Medium-Round".into();
     let bitmap_1 = fontkit