Finds all package.json files contained within the workspaces present in the current
startDirPath. A workspace root dir is found by recursively looking for a parent
package-lock.json file.
Parameters
startDirPath: string
Returns Promise<string[]>
Throws
If no directory with a package-lock.json file is found.
Finds all
package.jsonfiles contained within the workspaces present in the currentstartDirPath. A workspace root dir is found by recursively looking for a parentpackage-lock.jsonfile.