Marketplace v1.3.0 Contract

Store WASM Code\n\nThis uploads the code for Marketplace v1.3.0 the following updates:\n\n- Adds a new buy now message\n- Bugfix for trading with 0 royalties\n\nThe source code is available at https://github.com/public-awesome/marketplace/releases/tag/v1.3.0\n\n### Compile Instructions\n\nsh\ndocker run --rm -v \$(pwd)\:/code \\\n --mount type=volume,source=\$(basename \$(pwd)\)_cache\,target=/code/target \\\n --mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \\\n cosmwasm/workspace-optimizer:0.12.13\n\n\nThis results in the following SHA256 checksum:\n\n\n76e7311b15db66478a63e5c5310bb0480755dd2060f02e28c845ec4473edf85b sg_marketplace.wasm\n\n\n### Verify On-chain Contract\n\nsh\nstarsd q gov proposal $id --output json \\\n| jq -r '.content.wasm_byte_code' \\\n| base64 -d \\\n| gzip -dc \\\n| sha256sum\n\n\n### Verify Local Contract\n\n\nsha256sum artifacts/sg_marketplace.wasm\n\n\n