sockpp

The v0.8.x line is released as v1.0

Cherry-picked the upcoming v0.9 support for Catch2 v3.x back into the v0.8.x line of code.

• #64 Added support for Catch2 v3.x for unit tests. (v2.x still supported)
• Fixed a Connector unit test on windows

Minor bug fixes.

• #89 Fixed generator expression for older CMake
• #91 Fixed uniform_int_distribution<> in UNIX socket example

This release attempts to fix some of the outstanding build issues on Windows with MSVC and resolve some old issues and PR commits.

• Cherry picked most of the non-TLS commits in PR #17
  • Connector timeouts
  • Stateless reads & writes for streaming sockets w/ functions returning ioresult
  • Some small bug fixes
  • No shutdown on...

• [Breaking] Library initializer now uses a static singleton created via socket_initializer::initialize() call, which can be called repeatedly with no ill effect. Also added global socketpp::initialize() function as shortcut.
• Improvements to CMake to better follow modern standards.
  • CMake required version bumped up to 3.12
  • Generating CMake files for downstream projects (config,...