Bump libffi to 3.5.2

Fixes #59.

libFFI should now build properly on macOS Sonoma and newer by virtue of libffi/libffi@2d8868a

Author: johnzhou721

Makefile

@@ -70,7 +70,7 @@ MPDECIMAL_VERSION=4.0.0
 
 ZSTD_VERSION=1.5.7
 
-LIBFFI_VERSION=3.4.7
+LIBFFI_VERSION=3.5.2
 
 CURL_FLAGS=--disable --fail --location --create-dirs --progress-bar