(java) Improve detection of types, including generic and array types

[hns]

This improves detection of types in Java variable and method declarations, including support for generic and array types.

Resolves #3678
Resolves #4017
Resolves #4345

Changes

• The regexes for type name and type parameters for generic types are split so they can be highlighted independently.
• The regex for type parameters in generic types is improved to support wildcards and bounded types.
• A regex for array brackets is added to support array types.
• Regexes for type parameters and array brackets are added to variable and method declarations so they support generic and array types.
• Like types of variable declarations, return types in methods are highlighted as hljs-type, including the void type.

Checklist

• Added markup tests, or they don't apply here because...
• Updated the changelog at CHANGES.md