Log Message:
editorconfig-core: updated to 0.12.4

v0.12.4
Fix two OOM issues.
Fix one buffer overflow issue.
Fix one memory allocation error caused by strdup.
Upgrade CMake minimum to 3.5.1.
Other misc fixes.

v0.12.3
Bump required minimum cmake version to 2.8.12.
Support pcre2 and drop support for pcre.

v0.12.2
Add support for pkgconfig.
Memory leaks and crash fixes.
Improve error messages.
Add CI on AppVeyor.
Known issue: Test utf_8_char on AppVeyor won't pass.