Create the package
sfdx force:package:create --name ApexTestDataFactory --packagetype Unlocked --path force-app --targetdevhubusername MyDevOrg
Note : if there is already a promoted package version, update the version in sfdx-project.json before generating a new version
Create a package version
sfdx force:package:version:create --package ApexTestDataFactory --codecoverage --installationkeybypass --wait 20
Promote the package version
sfdx force:package:version:promote --package "04t..."