Update "newscoop/ingest-plugin-bundle" Package "newscoop/ingest-plugin-bundle" listed for update is not installed. Ignoring. Loading composer repositories with package information Updating dependencies Your requirements could not be resolved to an installable set of packages.
The plugin should now work when you enable it in the admin Plugins page.
However, some of the other errors in your report show composer is trying to fetch the most recent versions of dependencies which require php 7 (which means your composer.lock file is probably messed up!)
So, it might actually be easier for you to install the packaged version of Newscoop 4.4.7 before installing the plugin as this already includes the dependencies that are needed, instead of trying to get them using composer.