OpenSSL 3.0.0, WolfSSL, Hunter CMake, Boost.JSON, JWKs, ES256K

New Features

• Preliminary JWKs support by @tchinmai7 💟
• Implemented the "alg" ES256K
• Adds support for Hunter Package Manager.
• Add support for Boost.JSON (standalone C++17 variant)
• Add WolfSSL v5.0.0 support
• The example traits are now included in the JWT-CPP headers so everyone can use them.

Improvements

• jwt::verifier has been refactored to accept a more generic "verification operation". There are no API breaks.
• Support for OpenSSL 3.0.0 has been confirmed. 🤗 Thanks to @kleinmrk
• Adjustments to the RSA implementation by @akyidrian for wider compatibility
• Bump tested SSL options
• Adding clang-tidy, cmake-format, and ASAN tests
• Minimal key usage in RSA examples
• Simplify reading of EC keys by @kleinmrk 😻

Breaking Changes ⚠️

• jwt::picojson_traits became jwt::traits::kazuho_picojson #193

Improvements

• Removed all deprecated OpenSSL v3.0.0 API calls @kleinmrk

Bug Fixes

• Fixes to_lower that was actually doing a to_upper.
• Allow relative paths when install CMake for Hunter
• Fix shadow variables @XyFreak

Full Changelog: v0.5.1...v0.6.0