v2.2: Extended Control-Flow APIs

Minor

• Add: executor_t::make_mutex() helpers (28fb194)

Patch

• Improve: Styling argument-taking macros (f7c13e3)
• Fix: Upcast to colocated (62634ff)
• Fix: Default constructors should be noexcept (162a3ac)
• Fix: Avoid reserved names (5e45bf8)
• Make: cppcheck & clang-tidy targets (684b2aa)
• Make: Maximize warnings (834dd47)
• Improve: Reduce warnings (653b146)
• Fix: Dropping sign in comparison (821952d)
• Fix: Unused deadline_hi (4729e42)
• Improve: Reduce implicit conversions (f5641d8)