Log Message:
Update to 3.60

Upstream changes:
3.60 - 2020-08-11
 * Restore PERL_BCDVERSION helper which is used on CPAN
 * A few API elements were not properly found, like IVTYPE

 3.59 - 2020-08-10

 * Add PERL_VERSION_* compare macros
 * Rename PERL_BCDVERSION to internal name to discourage future use
 * Stop versioning generated test files
 * Enforce strict & warnings
 * Avoid indirect calls
 * scanprov: multiple improvements
 * Use ivers() in tests
 * Update POD documentation and HACKERS file
 * Change ppport.h --api-info to not output non-API info unless that is the
   only match
 * Find more elements to be listed in the --api-info option (and similar) to
   ppport.h