Currently java.sql.Array is only supported when returned from the
database. Passing arrays to the database is not supported.
Connection#createArrayOf, PreparedStatement#setArray and
PreparedStatement#setObject with a java.sql.Array are not supported.

This pull requests implements passing java.sql.Array objects to the
database and includes the following changes:

 - implement Connection#createArrayOf
 - implement PreparedStatement#setArray
 - implement array support in ResultSet#getObject
 - implement conversion from java.sql.Array to Value
 - update DataType#convertTo to support arrays as well
 - add tests for #createArrayOf, #setArray and #setObject
 - add tests for #getObject with an array argument
 - remove the test for Connection#createArrayOf being unsupported
 - remove the test for PreparedStatement#setArray being unsupported

The typeName passed to #createArrayOf is ignored, this is in accordance
with JdbcArray#getBaseTypeName returning "NULL" and
JdbcArray#getBaseType returning Types.NULL even if the backing array is
homogeneous.