Added "is Null" and "is Undefind" condition checks

We added two new conditions:

  • isNull
  • isUndefined

On the Condition and Condition w/ else actions.

"is Undefined" will check for attributes that have no definition in the flow

"is Null" will check for attributes (i.e. JSON coming from a Web Request) that is explicitly set to "null" value.

What do you think about this update?