Added test cases for date and datetime fields
Tested update by example
Fixed logic mistake
Test creation of a datetime field with default value
Tested creation with default value for date field
Tested equals operation for date field
Tested equals operation for datetime field
Tested foreign key field
Testing not equals
Updating changelog
Added remove and replace by example data
Added tests for the new queries
Tested what happens if there is no result
Testing number field behaviour
Updating changelog
Starting with the implementation of a queryset