Update Rust to remove deprecated code (#6)

* built: 0.5.1 -> 0.7.5

Options removed from build.rs are set by feature flags as of 0.7.0.
Reference: https://docs.rs/crate/built/0.7.5/source/CHANGELOG.md

* pyo3: 0.17.1 -> 0.23.3

* Cargo.toml: remove badges

crates.io no longer displays these.
Additionally the URLs were out of date.

* Cargo.toml: remove extension-module feature

This does not make sense as a feature because the extension does not
work without it.

* transform.py: fix deprecation warning

Author: newAM

CHANGELOG.md

@@ -8,6 +8,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ## [Unreleased]
 [Unreleased]: https://github.com/althonos/sphinxcontrib-svgbob/compare/v0.3.0...HEAD
 
+### Changed
+- Bumped `built` dependency from `0.5.1` to `0.7.5`.
+- Bumped `pyo3` dependency from `0.17.1` to `0.23.3`.
 
 ## [v0.3.0] - 2024-08-14
 [v0.3.0]: https://github.com/althonos/sphinxcontrib-svgbob/compare/v0.2.1...v0.3.0

setup.py

@@ -139,7 +139,6 @@ def setup_temp_rustc_unix(self, toolchain, profile):
             path=os.path.join("sphinxcontrib", "svgbob", "_svgbob", "Cargo.toml"),
             binding=setuptools_rust.Binding.PyO3,
             strip=setuptools_rust.Strip.Debug,
-            features=["extension-module"],
         )
     ],
 )