Allow multiple types in the type filter

The current type filter only allows a single type to be specified. This can cause problems when using a pom with packaging set to "pom" and a list of default type (jar) dependencies. Setting the type field to "jar" fails to match any artifacts because the main pom has a type set to pom.

The type field should allow multiple types to be specified to allow more flexibiilty and to allow jar dependencies to be selected from a pom with the packaging set to pom.