refs https://github.com/TryGhost/Ghost/issues/15725
This pull request adds a new configuration option for the Mailgun email
provider that allows the user to set the maximum number of recipients
per email batch via a new config option `bulkEmail.batchSize`
refs TryGhost/Team#3229
- The issue we are observing that even though the returned amount of email recipients should not ever accede the max batch size (1000 in case of MailGun), there are rare glitches when this number is doubled and we fetch 2000 records instead.
- The fix takes it's best guess in de-duping data in the batch and then truncates it if the amount of records is still above the threshold. This ensures we at least end up sending the emails out to some of the recipients instead of none.
As discussed with the product team we want to enforce kebab-case file names for
all files, with the exception of files which export a single class, in which
case they should be PascalCase and reflect the class which they export.
This will help find classes faster, and should push better naming for them too.
Some files and packages have been excluded from this linting, specifically when
a library or framework depends on the naming of a file for the functionality
e.g. Ember, knex-migrator, adapter-manager
