refactor: Upgrade to support actix-web 4.x

Cargo.lock

Cargo.toml

src/bundle/s3/packager.rs

src/bundle/s3/poller.rs

src/files/chunked.rs

src/files/mod.rs

src/files/named.rs

src/files/named_ext.rs

src/files/path_context.rs

src/files/pathbuf.rs

src/files/range.rs

src/files/service.rs

src/main.rs

src/server.rs

src/stats.rs