Regenerate docs & update changelog

Author: twistedfall

CHANGES.md

@@ -1,3 +1,8 @@
+* 0.95.4
+  * `MatSize` now carries a lifetime because it borrows the data from a `Mat` on creation.
+  * Conditional compilation macros for detecting which module is enabled are now added in the form `opencv_has_module_<MODULE_NAME>!`.
+  * An additional function for detecting the enabled modules is also introduced: `opencv_has_module(module)`.
+
 * 0.94.4
   * Downgrade the `windows` dependency for now to fix the build issue in https://github.com/twistedfall/opencv-rust/issues/660.