Version 1.8.3

Changelog:

• Several Qt6 compatibility fixes
• Replace usages of QRegExp with QRegularExpression
• Support adding QtWebApp as a CMake subdirectory of other projects
• Fix incorrect signature of TemplateCache::tryFile
• Consistently use qint64 for session time
• Add config option to control temp dir
• Remove tSocketDescriptor type alias
• Use a consistent code style using clang-format

Upstream Changelog:

• Fix compatibility issues with Qt 4.7 and 6.0.
• Removed qtservice, use the Non-Sucking Service Manager instead.
• Add Cookie attribute "SameSite".
• SessionStore does now emit a signal when a session expires.
• Fix threadId not printed in log file.
• The minLevel for logging can now be configured as string.
• Info messages are now positioned between DEBUG and WARNING.
• I also added an example for HTTP Basic authorization.