chore: bump version to 0.3.0 (#74)

Author: jackgerrits

src/vowpal_wabbit_next/_core.pyi

@@ -463,6 +463,6 @@ def _write_cache_example(workspace: Workspace, example: Example, file: object) -
     pass
 def _write_cache_header(workspace: Workspace, file: object) -> None:
     pass
-__version__ = '0.2.0'
+__version__ = '0.3.0'
 _vw_commit = '2238d70'
 _vw_version = '9.7.0'

version.txt

@@ -1 +1 @@
-0.2.0
+0.3.0