Launchpad v1 - Minter Update

Launchpad v1 - Minter Update v0.8.2 Update\n\nThis update of the v1 minter contract backports the\nability to update mint price and to set a discount price (mint price can not be increased only reduced)\nallowing creators to adjust collection mint price to current market conditions.\n\nThis contract cannot be instantiated and only supports migration.\n\n\nThe source code is available at https://github.com/public-awesome/launchpad/releases/tag/v0.8.2\n\n\nCompile instructions\n\n```\ndocker run --rm -v "$(pwd)":/code \

--mount type=volume,source="$(basename "$(pwd)")_cache",target=/code/target
--mount type=volume,source=registry_cache,target=/usr/local/cargo/registry
cosmwasm/workspace-optimizer:v0.12.8\n\nThis results in the following SHA256 checksums:\n8602c165969fb0bec3f829cd86898e12c667b514b1e682b12896b22af1591e2c minter.wasm\n\n# Verify on chain contract\nstarsd q gov proposal $id --output json
| jq -r '.content.wasm_byte_code'
| base64 -d
| gzip -dc
| sha256sum\n\n\n# Verify local contract\nsha256sum artifacts/minter.wasm\n```\n