Perhaps this may help for anyone who is still confused about parcel vs. parcel-bundler
"parcel" is version 2(new) of parcel and parcel is the module that must be used.According to the npm site, "parcel-bundler", which is version 1, is deprecated and should no longer be used.
_"This package has been deprecatedAuthor message:
Parcel v1 is no longer maintained. Please migrate to v2, which is published under the 'parcel' package. See https://v2.parceljs.org/getting-started/migration for details."_