Release v2.0 (compatible with Flurl v4.0+) 🚀

Release Notes

• Implement full support for Flurl v4.0+
• Completely rewritten Json processing engine to now support both System.Text.Json & Newtonsoft.Json.
• System.Text.Json processing with Json transformation strategy is now ~10X faster than the original Newtonsoft.Json processing.
• Optimized Newtonsoft.Json processing with new Json transformation strategy (vs Converter) which now benchmarks at ~2X faster.