Release refs/tags/v6.0.0-patched-snapshot-2021-11-21

QtCreator 6.0.0-snapshot based on Qt 6.2.1 + patches:

• Include Qbs in Github Actions
• Fixed Qt 6.2.0 and clangd support
• Improved QML/JS formatting
• Fixed MSVC output window link parsing
• Support for trailing return types in quickfixes
• Qbs Action to debug with Visual Studio
• Qbs Action to generate Visual Studio 2019 project
• extended macro expander for ActiveProject and CurrentTarget
• suppress pragma once warnings in headers
• error navigation in compile output window
• display snapshot version in about dialog
• properly indented line comments
• no jump to task list after build errors
• use patched qbs for Windows build
• use "c++2a" (gcc/clang) / "c++latest" (msvc) from qbs for clang code model

Qbs v1.21 patched snapshot 2021-11-14

• Usable msbuild project generator
• C++2a support for msvc
• Fixed cmake build