Sigma SDK v5.0.9 for Ergo mainnet v5.0.x

This release brings support of EIP-5: Contract Templates among other things.

What's Changed

• readme typing error revised by @flysky9981 in #858
• Add isEmpty method to the frontend compiler by @darkdrag00nv2 in #860
• Extract SigmaParser and deps into a new module by @darkdrag00nv2 in #864
• Move DataJsonEncoder and JsonCodecs to the sdk module by @darkdrag00nv2 in #867
• Implement ContractTemplate data structures according to EIP5 by @darkdrag00nv2 in #857

New Contributors

• @flysky9981 made their first contribution in #858
• @darkdrag00nv2 made their first contribution in #860

Full Changelog: v5.0.8...v5.0.9