Deserialize ISO_DATE to java.util.Date not supported

**Describe the bug**
From the JSON-B specification:

> Implementations MUST support deserialization of both ISO_DATE and ISO_DATE_TIME into
java.util.Date, Calendar and GregorianCalendar instances.

The JavaDoc on the `java.time.format.DateTimeFormatter.ISO_DATE` format contains the following comment, indicating that '2011-12-03' is a valid ISO_DATE formatted date.

> The ISO date formatter that formats or parses a date with the offset if available, such as '2011-12-03' or '2011-12-03+01:00'.

But when I run the following with Yasson:

```
System.out.println(jsonb.fromJson("2011-12-03", Date.class));
```

I get an error:

> Caused by: java.time.format.DateTimeParseException: Text '2011' could not be parsed at index 4

**To Reproduce**
```
System.out.println(jsonb.fromJson("2020-03-11", Date.class));
```

**Expected behavior**
A `Date` object instead of an error.

**System information:**
- OS: macOS
- Java Version: 8 & 11
- Yasson Version: 1.0.6

Start by running the reported jsonb.fromJson("2020-03-11", Date.class) reproduction and trace the ISO_DATE deserialization path that produces the DateTimeParseException. Compare the behavior with the JSON-B requirement for java.util.Date; done means an ISO date string returns a Date object without an error.

Written by the indexing model from the issue text.