Uses mini-parsers-temporal library to add duration strings to config files

DurationConverter.java

import heretical.parser.temporal.DurationParser;
import org.eclipse.microprofile.config.spi.Converter;

import java.time.Duration;

/**
 * Uses <a href="https://github.com/Heretical/mini-parsers">Mini-Parsers</a> to parse a duration string
 * in a config file.
 */
public class DurationConverter implements Converter<Duration> {
    DurationParser parser = new DurationParser();

    @Override
    public Duration convert(String value) throws IllegalArgumentException, NullPointerException {
        return parser.parse(value).getResult();
    }
}