Bump femtovg, rustybuzz, ttf-parser, and fontdb dependencies (#2191)

Mostly bugfix changes upstream with some minor API changes. FemtoVG is
no more limited to 24 gradient stops for the paint.

internal/compiler/Cargo.toml

@@ -60,7 +60,7 @@ tiny-skia = { version = "0.8.2", optional = true }
 resvg = { version = "0.28.0", optional = true }
 usvg = { version = "0.28.0", optional = true }
 # font embedding
-fontdb = { version = "0.10", features = ["fontconfig"], optional = true }
+fontdb = { version = "0.12", features = ["fontconfig"], optional = true }
 fontdue = { version = "0.7.1", optional = true }
 
 [target.'cfg(not(any(target_family = "windows", target_os = "macos", target_os = "ios", target_arch = "wasm32")))'.dependencies]

internal/compiler/passes/embed_glyphs.rs

@@ -191,7 +191,14 @@ pub fn embed_glyphs<'a>(
     )
     .expect("internal error: fontdb returned a font that ttf-parser/fontdue could not parse");
                 embed_font(
-                    fontdb.face(face_id).unwrap().family.clone(),
+                    fontdb
+                        .face(face_id)
+                        .unwrap()
+                        .families
+                        .first()
+                        .expect("TrueType font without english family name encountered")
+                        .0
+                        .clone(),
                     font,
                     &pixel_sizes,
                     characters_seen.iter().cloned(),