Log Message:
Update to 1.64

Upstream changes:
1.64 2022-08-16 rurban
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  * Exec: Silence all Windows -Wint-conversion and -Wint-to-pointer-cast
    warnings

1.63 2022-08-11 rurban
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  * Exec: Really fix USE_ITHREADS (GH #17) with USE_THREADS
    on windows. USE_5005THREADS is not defined in older perls, but
    OLD_PTHREADS_API is.

1.62 2022-08-10 rurban
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  * Exec: compile with USE_THREADS and USE_ITHREADS (GH #17)
  * add a make release target

1.61 2022-06-13 rurban
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  * perfilter.pod: minor improvements (PR #16 khw)
  * Remove runtime recommends META (GH #14 kentfredric)
  * use strict in all modules. Fixes Test::Kwalitee.
  * Add github actions, and cirrus CI's
  * Updated Copyright years.