Update to Rust Edition 2021, remove extern crate

Author: waywardmonkeys

Cargo.toml

@@ -8,7 +8,7 @@ license = "MIT"
 readme = "README.md"
 repository = "https://github.com/PistonDevelopers/freetype-rs.git"
 homepage = "https://github.com/PistonDevelopers/freetype-rs"
-edition = "2018"
+edition = "2021"
 
 [lib]
 name = "freetype"

examples/glyph_outline.rs

@@ -1,4 +1,4 @@
-extern crate freetype as ft;
+use freetype as ft;
 
 fn draw_curve(curve: ft::outline::Curve) {
     match curve {

examples/single_glyph.rs

@@ -1,5 +1,4 @@
-extern crate freetype as ft;
-extern crate unicode_normalization;
+use freetype as ft;
 
 use unicode_normalization::UnicodeNormalization;