ext/typeexpr: Skip null objects when applying defaults. This prevents crashes when null objects are creating inside collections, and stops incomplete objects being created with only optional attributes set. (#567)
ext/typeexpr: Ensure default values do not have optional metadata attached. This prevents crashes when default values are inserted into concrete go-cty values that have also been stripped of their optional metadata. (#568)
Enhancements
ext/typeexpr: With the go-cty upstream depenendency updated to v1.12.0, the Defaults struct and associated functions can apply additional and more flexible 'unsafe' conversions (examples include tuples into collections such as lists and sets, and additional safety around null and dynamic values). (#564)
ext/typeexpr: With the go-cty upstream depenendency updated to v1.12.0, users should now apply the go-cty convert functionality before setting defaults on a given cty.Value, rather than after, if they require a specific cty.Type. (#564)
