Add four new fields to ClassUsage

[KengoTODA]

In the official document there are four new fields described. This PR adds them into the ClassUsage class, to resolve exceptions reported as #177.

Note that this change is not enough to fully support version 21.3.0.
Some test cases still fail caused by exceptions like below, and I found no solution:

Caused by: com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `org.mikeneck.graalvm.config.ProxyUsage<java.lang.String>` out of START_OBJECT token
 at [Source: (BufferedReader); line: 2, column: 3] (through reference chain: org.mikeneck.graalvm.config.ProxyConfig[0])
	at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:59)
	at com.fasterxml.jackson.databind.DeserializationContext.reportInputMismatch(DeserializationContext.java:1468)
	at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1242)
	at com.fasterxml.jackson.databind.DeserializationContext.handleUnexpectedToken(DeserializationContext.java:1148)
	at com.fasterxml.jackson.databind.deser.std.StringCollectionDeserializer.handleNonArray(StringCollectionDeserializer.java:274)
	at com.fasterxml.jackson.databind.deser.std.StringCollectionDeserializer.deserialize(StringCollectionDeserializer.java:183)
	at com.fasterxml.jackson.databind.deser.std.StringCollectionDeserializer.deserialize(StringCollectionDeserializer.java:173)
	at com.fasterxml.jackson.databind.deser.std.StringCollectionDeserializer.deserialize(StringCollectionDeserializer.java:21)
	at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:291)
	at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:250)
	at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:27)
	at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4524)
	at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3479)
	at org.mikeneck.graalvm.config.task.DefaultMergeConfigFileWork.readAllFromInputFiles(DefaultMergeConfigFileWork.java:67)