Allow some of the SVG support in `no_std` #540

Job	Run time
cargo fmt	25s
cargo test (windows-latest)	46s
cargo test (macos-latest)	22s
cargo check (msrv) (wasm32)	23s
cargo check (msrv) (windows-latest)	1m 2s
cargo test (ubuntu-latest)	23s
cargo clippy (windows-latest)	1m 16s
cargo check (msrv) (macos-latest)	28s
cargo clippy (macos-latest)	39s
cargo clippy (wasm32)	35s
cargo check (msrv) (ubuntu-latest)	24s
cargo clippy (ubuntu-latest)	41s
cargo doc	13s
cargo test (wasm32)	21s
typos	3s
	8m 1s

Provide feedback