Bump xml-rs from 0.8.13 to 0.8.15 (#3145) #6589

Job	Run time
Check wasm32 + wasm-bindgen	3m 46s
Format + check + test	8m 26s
android	49s
Check Windows	2m 29s
cargo-deny aarch64-apple-darwin	3m 2s
cargo-deny aarch64-linux-android	2m 41s
cargo-deny i686-pc-windows-gnu	3m 8s
cargo-deny i686-pc-windows-msvc	2m 44s
cargo-deny i686-unknown-linux-gnu	2m 37s
cargo-deny wasm32-unknown-unknown	3m 2s
cargo-deny x86_64-apple-darwin	2m 29s
cargo-deny x86_64-pc-windows-gnu	3m 10s
cargo-deny x86_64-pc-windows-msvc	2m 35s
cargo-deny x86_64-unknown-linux-gnu	2m 43s
cargo-deny x86_64-unknown-linux-musl	2m 50s
cargo-deny x86_64-unknown-redox	2m 45s
	49m 16s

Provide feedback