Update object requirement from 0.18 to 0.19

Updates the requirements on [object](https://github.com/gimli-rs/object) to permit the latest version.
- [Release notes](https://github.com/gimli-rs/object/releases)
- [Commits](gimli-rs/object@0.18.0...0.19.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Cargo.toml

@@ -26,7 +26,7 @@ crossbeam = "0.7.1"
 getopts = "0.2"
 memmap = "0.7"
 num_cpus = "1"
-object = "0.18"
+object = "0.19"
 rayon = "1.0"
 regex = "1"
 test-assembler = "0.1.3"