v0.13.0

This release contains a major bug fix in coro::task_container that would destroy the user task before it would start.

What's Changed

• Upgrade emscripten build by @jbaldwin in #282
• Add test for when_all throwing on individual tasks. by @jbaldwin in #281
• Disable mac ci builds by @jbaldwin in #290
• coro::task_container gc fix not completing coroutines by @jbaldwin in #288

Full Changelog: v0.12.1...v0.13.0