rel(1.2.8): Update CHANGES [skip ci]
+1.2.8 (September 03, 2020)
+==========================
+Bug-fix release in the 1.2.x series with a minor improvement of the correlations plot.
+
+* FIX: Improved control over correlations plot (#561)
+
1.2.7 (August 12, 2020)
=======================
Bug-fix release in the 1.2.x series with a very minor improvement of the reportlets.
