See Stringify for when to call this method.
key is the string content of the property name.
Surrounding quotes will be added and any special characters will be escaped.
See also objectFieldRaw.
pub fn objectField(self: *Stringify, key: []const u8) Error!void
pub fn objectField(self: *Stringify, key: []const u8) Error!void {
if (build_mode_has_safety) assert(self.raw_streaming_mode == .none);
try self.objectFieldStart();
try encodeJsonString(key, self.options, self.writer);
self.next_punctuation = .colon;
}