* feat(plugin): add `proxywasm` plugin
The `proxywasm` plugin is a WASM Filter following the ProxyWasm ABI Specification using the proxywasm go sdk
This allows extensibility with any reverse proxy who implements the ProxyWasm ABI Specification.
The current WASM Filter was successfully tested with APISIX, Envoy, Nginx with ngx_wasm_module from Kong and Istio.
Fixes#145
Currently the documentation states that `docker_swarm` is an acceptable value for the Docker Swarm provider.
However, the code actually uses `swarm`.
This changes adds `docker_swarm` as a supported provider alias for docker swarm.
Closes#279
