Update to 1.58

Upstream changes:
1.58 2017-11-15 rurban
----
  * Drop 5.005 support
  * Switch from DynaLoader to XSLoader [atoomic #5]
  * Replace use vars by our. [atoomic #5]
  * Lazy load Carp only when required. [atoomic #5]
  * Minor test improvements
  * Fix v5.8 cast warnings

(wen)