chore: release v0.4.0 (#34)

## 🤖 New release
* `tket-json-rs`: 0.3.1 -> 0.4.0 (⚠️ API breaking changes)

### ⚠️ `tket-json-rs` breaking changes

```
--- failure enum_missing: pub enum removed or renamed ---

Description:
A publicly-visible enum cannot be imported by its prior path. A `pub use` may have been removed, or the enum itself may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.30.0/src/lints/enum_missing.ron

Failed in:
  enum tket_json_rs::circuit_json::OpBox, previously in file /tmp/.tmpVNdz4z/tket-json-rs/src/circuit_json.rs:67
  enum tket_json_rs::circuit_json::ToffoliBoxSynthStrat, previously in file /tmp/.tmpVNdz4z/tket-json-rs/src/circuit_json.rs:302

--- failure struct_missing: pub struct removed or renamed ---

Description:
A publicly-visible struct cannot be imported by its prior path. A `pub use` may have been removed, or the struct itself may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.30.0/src/lints/struct_missing.ron

Failed in:
  struct tket_json_rs::circuit_json::BoxID, previously in file /tmp/.tmpVNdz4z/tket-json-rs/src/circuit_json.rs:58
  struct tket_json_rs::circuit_json::PauliStabiliser, previously in file /tmp/.tmpVNdz4z/tket-json-rs/src/circuit_json.rs:51
```

<details><summary><i><b>Changelog</b></i></summary><p>

<blockquote>

## 0.4.0 (2024-04-08)

### Bug Fixes

- Add missing OpTypes
([#37](#37))

### Miscellaneous Tasks

- [**breaking**] Update pyo3 to 0.21
([#33](#33))

### Refactor

- Move `OpBox` to a new module
([#35](#35))
</blockquote>


</p></details>

---
This PR was generated with
[release-plz](https://github.com/MarcoIeni/release-plz/).

---------

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Agustín Borgna <121866228+aborgna-q@users.noreply.github.com>

CHANGELOG.md

@@ -1,5 +1,22 @@
 # Release notes
 
+## 0.4.0 (2024-04-08)
+
+This release adds various missing `OpType` definitions, and fixes some existing box definitions with incorrect parameters.
+
+### Bug Fixes
+
+- Add missing OpTypes ([#37](https://github.com/CQCL/tket-json-rs/pull/37))
+
+### Miscellaneous Tasks
+
+- [**breaking**] Update pyo3 to 0.21 ([#33](https://github.com/CQCL/tket-json-rs/pull/33))
+
+### Refactor
+
+- Move `OpBox` to a new module ([#35](https://github.com/CQCL/tket-json-rs/pull/35))
+
+
 ## 0.3.1 (2024-02-26)
 
 ### Features
@@ -26,4 +43,4 @@
 
 ## v0.1.0 (2023-08-18)
 
--   Initial release.
+-   Initial release.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "tket-json-rs"
-version = "0.3.1"
+version = "0.4.0"
 license = "Apache-2.0"
 edition = "2021"
 rust-version = "1.70"