Merge branch '1.2'

Author: iamsergio

README.md

@@ -145,11 +145,16 @@ $ python3 main.py
 ```
 
 
-Supported Qt versions
-======================
+Supported Qt versions and toolchains
+=====================================
 KDDockWidgets requires Qt >= 5.9 (or >=5.12 if Python bindings are enabled).
 The QtQuick support will require Qt >= 5.15.
-Qt 6 will be support as long as QTBUG-88611 is finished, most likely for 6.1.
+Qt 6 is supported.
+
+Regarding compilers, whatever toolchain is able to build Qt 5.9 should also be
+fine to build KDDW. Note however that MSVC 2013 support will be dropped in KDDW v1.3,
+due to that compiler crashing.
+
 
 Licensing
 =========