chore: release v0.3.0 (#26)

## 🤖 New release
* `tket-json-rs`: 0.2.0 -> 0.3.0 (⚠️ API breaking changes)

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

```
--- failure inherent_method_missing: pub method removed or renamed ---

Description:
A publicly-visible method or associated fn is no longer available under its prior name. It 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/v0.24.2/src/lints/inherent_method_missing.ron

Failed in:
  SerialCircuit::_from_tket1, previously in file /tmp/.tmpCcfyh4/tket-json-rs/src/pytket.rs:10

--- failure method_parameter_count_changed: pub method parameter count changed ---

Description:
A publicly-visible method now takes a different number of parameters.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#fn-change-arity
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.24.2/src/lints/method_parameter_count_changed.ron

Failed in:
  tket_json_rs::circuit_json::SerialCircuit::to_tket1 now takes 2 parameters instead of 1, in /tmp/.tmpvYRSl5/tket-json-rs/src/pytket.rs:22
```

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

<blockquote>

## 0.3.0 (2023-11-09)

### Features

- [**breaking**] Non-locking python conversion calls
([#25](#25))
</blockquote>


</p></details>

---
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CHANGELOG.md

@@ -1,5 +1,11 @@
 # Release notes
 
+## 0.3.0 (2023-11-09)
+
+### Features
+
+- [**breaking**] Non-locking python conversion calls ([#25](https://github.com/CQCL/tket-json-rs/pull/25))
+
 ## 0.2.0 (2023-10-16)
 
 ### Features

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "tket-json-rs"
-version = "0.2.0"
+version = "0.3.0"
 license = "Apache-2.0"
 edition = "2021"
 rust-version = "1.70"