changelog: document D4 set 1 typecheck additions and deprecations

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Technologicat

CHANGELOG.md

@@ -17,6 +17,7 @@
 - New `unpythonic.test.runner` module: reusable test runner with module discovery, version-suffix gating (e.g. `test_foo_3_11.py` skipped on Python < 3.11), and integration with the test framework's warning system. Other projects using `unpythonic.test.fixtures` can import it directly.
 - New `emit_warning()` function in `unpythonic.test.fixtures` for signaling test warnings from infrastructure code (outside `test[]`/`warn[]` macros). Used by the test runner for version-suffix skips, which show in the testset warning count.
 - Missing optional dependencies (sympy, mpmath) in tests emit `warn[]` instead of `error[]`, correctly reflecting that these are expected skips, not failures.
+- Runtime type checker (`unpythonic.typecheck`): new supported typing features — `NoReturn`, `Never` (3.11+), `Literal`, `Type`, `ClassVar`, `Final`, `DefaultDict`, `OrderedDict`, `Counter`, `ChainMap`.
 
 **Fixed**:
 
@@ -33,6 +34,7 @@
 **Deprecated**:
 
 - Parenthesis syntax for macro arguments (e.g. `let((x, 1), (y, 2))`). Use bracket syntax instead: `let[[x, 1], [y, 2]]`. The parenthesis syntax is kept for backward compatibility but may be removed in a future version.
+- Runtime type checker: `typing.Text` (deprecated since Python 3.11) and `typing.ByteString` (deprecated since Python 3.12) support is now marked for removal when the floor bumps to Python 3.12.
 
 
 ---