9.2.4: Generic types fix

• Merged PR #41: Migrate to new testing library - @thekid
• Fixed lang.ast.nodes.TypeDeclaration::declaration() for generics
  (@thekid)
• Fixed lang.ast.types.IsGeneric::literal() not returning a fully
  qualified type name
  (@thekid)
• Fixed endless loop with syntax errors in new - @thekid