Timeout configuration and opt-out libCURL initialization

• Default connect timeout is changed from 5 minutes (libCURL default) to 5 seconds
• Allow to configure connect and request timeouts
• Allow to completely skip libCURL initialization/deinitialization in Ppconsul
• Tests were updated to pass with Consul 1.11.1
• Documentation updated

Fix Apple M1 build and other changes

v0.2.2

Upgrade to Catch v2.13.6 to support Apple M1

Fix compilation for GCC and other build issues

• Fix compilation for GCC and other build issues
• Add conanfile.txt to use Conan package manager for getting dependencies

Added thread safety, HTTP client pool and HTTP client factory

• Ppconsul is refactored to be thread safe
• Consul uses a pool of HTTP clients
• HTTP client factory can be provided to Consul constructor

First release

Support ppconsul::kw::enable_stop for libcurl <= 7.31.0 (e.g. RedHat 7)

using deprecated CURLOPT_PROGRESSFUNCTION/CURLOPT_PROGRESSDATA inside
a #ifdef