Add skrifa/libm to no_std feature

Author: valadaptive

Cargo.toml

@@ -49,7 +49,7 @@ optional = true
 default = ["std", "swash", "fontconfig"]
 fontconfig = ["fontdb/fontconfig", "std"]
 monospace_fallback = []
-no_std = ["hashbrown", "dep:libm", "core_maths"]
+no_std = ["hashbrown", "dep:libm", "skrifa/libm", "core_maths"]
 peniko = ["dep:peniko"]
 shape-run-cache = []
 std = [