Add CHANGELOG entry for pytest-dev#153

Author: nicoddemus

CHANGELOG.rst

@@ -1,6 +1,10 @@
 2.1
 ---
 
+- ``waitSignal`` and ``waitSignals`` now provide much more detailed messages
+  when expected signals are not emitted. Many thanks to `@MShekow`_ for the PR
+  (`#153`_).
+
 - ``qtbot`` fixture now can capture Qt virtual method exceptions in a block using
   ``capture_exceptions`` (`#154`_). Thanks to `@fogo`_ for the PR.
 
@@ -9,6 +13,7 @@
 
 .. _qWaitForWindowExposed: https://doc.qt.io/qt-5/qtest.html#qWaitForWindowExposed
 
+.. _#153: https://github.com/pytest-dev/pytest-qt/issues/153
 .. _#154: https://github.com/pytest-dev/pytest-qt/issues/154
 .. _#158: https://github.com/pytest-dev/pytest-qt/issues/158