Need to implement changing 'license' value from a single string item to
being either a string item that is valid spdx id, or a list of string items that
are valid spdx items.
license
A one or many licenses of a collection.
To specify a common license (e.g. MIT or 3-Clause BSD) a valid SPDX license identifier should be used.
license: "MIT"
For multiple licenses user should specify them in a list
license:
BSD-3-Clause
MIT
For custom license user should use license_file attribute to specify a location of a custom license file. A custom license file should be included in a package during build process.
Need to implement changing 'license' value from a single string item to being either a string item that is valid spdx id, or a list of string items that are valid spdx items.