Description

Adds the missing license and authors fields to the Cargo.toml of fyrox-material.

Review Guidance

Our cargo-deny setup is complaining that this crate doesn't have a license.

Checklist

• My code follows the project's code style guidelines
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly
• My changes don't generate new warnings or errors
• No unsafe code introduced (or if introduced, thoroughly justified and documented)