DLT Loans expectation fails 100%

The expectation

> `Payments should be this year`  EXPECT (next_payment_date > date('2020-12-31')

Fails 100% - something wrong with the date format?! I could not figure it out :(

/dbdemos-notebooks/product_demos/Delta-Live-Table/dlt-loans/01-DLT-Loan-pipeline-SQL
