CI: Github Actions (envoyproxy#127)

Signed-off-by: Steve Sloka <slokas@vmware.com>

go version: update to 1.11 (envoyproxy#53)

redis: add the option to use a separate redis pool for per second lim…

…its (envoyproxy#41)

redis: add the option to use a separate redis pool for per second lim…

…its (envoyproxy#41)

proto: check in protos to allow importing ratelimit as a library (env…

…oyproxy#40)

proto: use the proto defined in data-plane-api (envoyproxy#39)

update dependencies (envoyproxy#35)

* update dependencies