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kotlinlang

Hi. I have a data class
```
data class SID(
        @Pattern(regexp="[0-9a-zA-Z]{1,50}", message = "Недопустимые символы в SID")
        val sid: String
) {
    override fun toString(): String {
        return sid
    }
}
```

The jackson v. 2.9.7 shows me an error when I try to deserialize SID from string in message
```
            {
                "sid":"qweasdzxc",
                "date":1537893098
}
```

Error:
```
com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `SID` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('qweasdzxc')
 at [Source: (String)"{
    "sid":"qweasdzxc",
    "date":1537893098,
...
```

Do you have the `jackson-module-kotlin` loaded?