feat(project): update version and add pydantic dependency

- Bump project version from 0.4.2 to 0.4.3.
- Add `pydantic` as a dependency for improved data validation.

Signed-off-by: Max P. <Mail@MPassarello.de>

pyproject.toml

@@ -1,12 +1,16 @@
 [project]
 name = "pyvtt"
-version = "0.4.2"
+version = "0.4.3"
 description = "Python Voice to Text + LLMA"
 authors = [{ name = "Max P.", email = "Mail@MPassarello.de" }]
 license = { text = "MIT" }
 readme = "README.md"
 requires-python = ">=3.12"
-dependencies = ["pyqt5 (>=5.15.11,<6.0.0)", "requests (>=2.32.3,<3.0.0)"]
+dependencies = [
+    "pyqt5 (>=5.15.11,<6.0.0)",
+    "requests (>=2.32.3,<3.0.0)",
+    "pydantic (>=2.11.4,<3.0.0)",
+]
 
 [tool.poetry]
 packages = [{ include = "pyvtt", from = "src" }]