Release 0.2.0

doc/README_SETUP.md

@@ -34,6 +34,11 @@ have to add `build/lib/` (or, alternatively after installation,
 `CMAKE_INSTALL_PREFIX/lib`) to your `DYLD_LIBRARY_PATH` environmental
 variable.
 
+#### Problems and solutions ####
+
+- Make sure that your conan version supports your XCode version.  A typical symptom of version
+  mismatch is for example conan complaining about incompatible `compiler.version` settings.
+
 ### How to build on Windows
 
 We use [Visual Studio 2019](https://visualstudio.microsoft.com/de/vs/features/cplusplus/)