Bump version to 0.16.1 and update changelog

Author: ThomasMalletCodra

CHANGELOG.md

@@ -1,5 +1,13 @@
 # PythonQwt Releases
 
+## Version 0.16.1
+
+### Bug fixes
+
+- Fixed [Issue #107](https://github.com/PlotPyStack/PythonQwt/issues/107): corrected a Windows crash/access violation that could occur in long-running sessions creating and rendering large amounts of data, due to GDI handle exhaustion caused by object lifetime and cache growth
+- Preserved the rendering performance improvements introduced in 0.16.0 while restoring safer Qt object ownership for internal text/scale-draw private data and adding defensive limits to font-metrics caches
+
+
 ## Version 0.16.0
 
 ### Performance

qwt/__init__.py

@@ -63,7 +63,7 @@
 from qwt.text import QwtText  # noqa: F401
 from qwt.toqimage import array_to_qimage as toQImage  # noqa: F401
 
-__version__ = "0.16.0"
+__version__ = "0.16.1"
 QWT_VERSION_STR = "6.1.5"