Add missing dependency version for tch-ext. (LaurentMazare#715)

* Add missing version.

* Add the release date.

* Add some missing fields.

CHANGELOG.md

@@ -4,7 +4,7 @@ This documents the main changes to the `tch` crate.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## v0.13.0 - unreleased yet
+## v0.13.0 - 2023-05-18
 ### Added
 - Support static linking in the build script,
   [712](https://github.com/LaurentMazare/tch-rs/pull/712).

examples/python-extension/Cargo.toml

@@ -1,14 +1,22 @@
 [package]
 name = "tch-ext"
 version = "0.1.0"
+authors = ["Laurent Mazare <[email protected]>"]
 edition = "2021"
 build = "build.rs"
 
+description = "Sample Python extension using tch to interact with PyTorch."
+repository = "https://github.com/LaurentMazare/tch-rs"
+keywords = ["pytorch", "deep-learning", "machine-learning"]
+categories = ["science"]
+license = "MIT/Apache-2.0"
+readme = "README.md"
+
 [lib]
 name = "tch_ext"
 crate-type = ["cdylib"]
 
 [dependencies]
 pyo3 = { version = "0.18.3", features = ["extension-module"] }
 tch = { path = "../..", features = ["python-extension"], version = "0.13.0" }
-torch-sys = { path = "../../torch-sys", features = ["python-extension"] }
+torch-sys = { path = "../../torch-sys", features = ["python-extension"], version = "0.13.0" }