Resolve "Selecting Yes No Question without custom labels doesnt show answer options in the preview" (#155)

About the issue

The error came from the fact that the options key on the Question type is potentially undefined. When this is the case the widget match function fails due to an undefined property read error

About the fix

Using the optional chaining operator (?.) makes the access undefined safe. I also changed the type definition to indicate that options may be undefined

Closes #155 (closed)