Import Upstream version 0.5.19

.cargo_vcs_info.json

.github/FUNDING.yml

.github/workflows/ci.yml

.gitignore

Cargo.toml

Cargo.toml.orig

LICENSE-APACHE

LICENSE-MIT

README.md

build.rs

src/error.rs

src/iter.rs

src/lib.rs

src/parse.rs

src/quote.rs

tests/compiletest.rs

tests/ui/private.rs

tests/ui/private.stderr

tests/ui/unexpected-arg.rs

tests/ui/unexpected-arg.stderr