Merge pull request #978 from redboltz/update_to_13.2.1

Update the version to 13.2.1.

Merge pull request #974 from redboltz/update_to_13.2.0

Updated to the version 13.2.0.

Merge pull request #946 from redboltz/update_to_13.1.0

Update the version to 13.1.0.

Merge pull request #935 from redboltz/fix_934

Fixed #934.

Merge pull request #926 from redboltz/update_version_12.1.0

Update the version to 12.1.0.

Merge pull request #872 from redboltz/fix_auto_threads_per_ioc

Fixed automatic threads_per_ioc logic.

Merge pull request #819 from redboltz/update_to_11_1_0

Updated CHANGELOG.

Merge pull request #815 from redboltz/update_to_11

Added CHANGELOG.

Merge pull request #809 from redboltz/update_to_10.0

Update the version to 10.0.0.

Merge pull request #745 from redboltz/move_boost_asio_no_deprecated_t…

…o_ci

Moved BOOST_ASIO_NO_DEPRECATED to CI.