emails.bulkSendStatus not returning validationErrors

[apptaro]

https://github.com/mailersend/mailersend-java/blob/021ee36bb653103f9a4e0b0482b87624fed4a579/src/main/java/com/mailersend/sdk/emails/Emails.java#L188C60-L188C78

Please fix the typo there: "validataion_errors" -> "validation_errors"

[apptaro]

mailersend-java/src/main/java/com/mailersend/sdk/emails/Emails.java

Line 190 in 021ee36

if (validationErrorsEl != null) {

We also need to change:
if (validationErrorsEl != null) {
to
if (validationErrorsEl != null && !validationErrorsEl.isJsonNull()) {
to avoid exception.