The SAP NPM registry has been migrated to the default public registry,
thus the separate configuration with the sapNpmRegistry is not required
anymore.
All packages from npm.sap.com have been migrated to npmjs.org
and in the future SAP packages will only be available from the default
public registry.
This change refactors the npm pkg and npmExecuteScripts implementations
to be reusable for future steps, e.g., npmExecuteLint.
In addition, it fixes few small bugs related to unit test execution on
Windows and the fileUtils mocking implementation.
Co-authored-by: Daniel Kurzynski <daniel.kurzynski@sap.com>
Co-authored-by: Stephan Aßmus <stephan.assmus@sap.com>
