license not a valid SPDX expression

[augustjanse]

The license in package.json does not follow a certain standard. Thus it results in an error when using webpack-license-plugin

ERROR in WebpackLicensePlugin: License "Apache License, Version 2.0" for [email protected] is not a valid SPDX expression!

Should be a simple fix:

https://docs.npmjs.com/cli/v9/configuring-npm/package-json#license