Release 0.3.0 — sync to ktav 0.3.0

Pick up the upstream Rust crate's reject-paren-strings change. Inline
paren-wrapped scalars like `a: (hello)` and `a: ((wrapped))` are now
decode errors. The PyO3 binding inherits this behaviour transparently;
all 234 tests pass against the synced spec submodule.

- Cargo.toml: ktav-python 0.2.0 → 0.3.0, ktav 0.2.0 → 0.3.0
- CHANGELOG.md / CHANGELOG.ru.md: 0.3.0 entry
- spec submodule: fe125c4 → 46d94a7 (new inline_paren_string_*
  invalid fixtures, tightened partial_parens valid-fixture)

Author: PHPCraftdream

CHANGELOG.md

@@ -12,6 +12,23 @@ For the format specification's own history, see
 underlying Rust implementation, see
 [`ktav-lang/rust`](https://github.com/ktav-lang/rust).
 
+## [0.3.0] — 2026-05-08
+
+### Changed (breaking)
+
+- **Picked up `ktav 0.3.0`** — the upstream Rust crate's reject-paren-strings
+  change. Inline paren-wrapped scalars like `a: (hello)` and `a: ((wrapped))`
+  are now decode errors. The PyO3 binding inherits this behaviour
+  transparently. See the
+  [`ktav` crate CHANGELOG](https://github.com/ktav-lang/rust/blob/main/CHANGELOG.md#030--2026-05-08).
+
+### Spec
+
+- spec submodule synced to `46d94a7` (new invalid fixtures
+  `inline_paren_string_double` and `inline_paren_string_single`,
+  tightened `partial_parens` valid-fixture).
+
+
 ## [0.2.0] — 2026-05-07
 
 ### Changed (breaking)

CHANGELOG.ru.md

@@ -12,6 +12,33 @@
 Rust-реализация — в
 [`ktav-lang/rust`](https://github.com/ktav-lang/rust).
 
+## [0.3.0] — 2026-05-08
+
+### Изменено (ломающее)
+
+- **Подхватили `ktav 0.3.0`** — изменение upstream Rust crate по
+  отклонению paren-strings. Inline paren-обёрнутые скаляры вида
+  `a: (hello)` и `a: ((wrapped))` теперь decode error. PyO3 binding
+  наследует поведение прозрачно. См.
+  [`ktav` crate CHANGELOG](https://github.com/ktav-lang/rust/blob/main/CHANGELOG.md#030--2026-05-08).
+
+### Спецификация
+
+- spec submodule синхронизирован на `46d94a7` (новые invalid fixtures
+  `inline_paren_string_double` и `inline_paren_string_single`,
+  ужесточён `partial_parens` valid-fixture).
+
+
+## [0.2.0] — 2026-05-07
+
+### Изменено (ломающее)
+
+- **Подхватили `ktav 0.2.0`** — многострочные строки теперь по
+  умолчанию сериализуются в indented stripped форме `( ... )`. `:f 42`
+  принимает целочисленные литералы (парсится как `42.0`). См.
+  [`ktav` crate CHANGELOG](https://github.com/ktav-lang/rust/blob/main/CHANGELOG.md#020--2026-05-07).
+
+
 ## [0.1.2] — 2026-05-03
 
 ### Изменено

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ktav-python"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2021"
 description = "Python bindings for the Ktav configuration format"
 license = "MIT"
@@ -18,7 +18,7 @@ name = "_core"
 crate-type = ["cdylib"]
 
 [dependencies]
-ktav = "0.2.0"
+ktav = "0.3.0"
 pyo3 = { version = "0.28", features = ["abi3-py39", "extension-module", "indexmap", "generate-import-lib"] }
 indexmap = "2"
 rustc-hash = "2"