Eli Schwartz authored Jun 25, 2019 and Allan McRae committed Jun 28, 2019

This works everywhere that gpgme >= 1.13.0 because it is a pkg-config
dependency, and meson 0.51 adds a fallback config-tool dependency
provider that detects older versions of gpgme seamlessly via
gpgme-config.

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>