Release v0.11.1 hotfix (jbaldwin#253)

Release v0.11 (jbaldwin#250)

Closes jbaldwin#241

Release v0.10.0 (jbaldwin#223)

Release v0.9 (jbaldwin#165)

Add a LIBCORO_FEATURE_NETWORKING option (jbaldwin#141)

* Add a LIBCORO_FEATURE_NETWORKING option

A request was made for an OSAL type build of libcoro. To accomodate this
I opted to turn the networking portion of libcoro into an optional build
type that is enabled by default.

Closes jbaldwin#138

Asynchronous Echo Server Example (jbaldwin#126)

* Asynchronous Echo Server Example

Added example/coro_tcp_echo_server.cpp for benchmarking/example.
Added example/coro_http_200_ok_server.cpp for benchmarking/example.

Closes jbaldwin#123

Upgrade to make the project work with nix (jbaldwin#121)

* Convert expected vendor dependency to submodle and upgrade

Submodule makes it easier to upgrade to the latest version.

* Add install target to the makefile + pkgconfig

add make install target. Also pc pkgconfig file.

Remove exceptions for control flow (jbaldwin#118)

* Remove exceptions for control flow

* semaphore
* ring_buffer

* Update readme with details on tartan llama library

Upgrade to catch2 v3 amalgamated headers (jbaldwin#114)

Fixes jbaldwin#109 fn overload on task promise::return_void bug (jbal…

…dwin#110)

The return_void() overload was throwing, but this is
incorrect per the standard, it should effectively do
nothing.  This was an error on my part since I over-
loaded the non-void task<T> return_value(T) -> void
and return_value() -> T fns.  This overload isn't
possible with the void versions since the signature
is identical, thus the bug caused the compiler's coroutine
version to re-throw exceptions at the wrong time.