bump up to 4.5.3 with cheevos support, fixes #108

CHANGES.md

 # Future
 
 # 4.5.3
+- CORE: fix memory chip configuration - thx @jcgamestoy
+- CPC+: now using white cart also marked as experimental
+- AUTORUN: fix ARMOURLOC protection
+- AUTORUN: find for DISC/DISK filenames
+- AUTORUN: computer restart fixes
+- CORE: fixed max memory configuration
+- CORE: do not reallocate ram on reset
 - CHEEVOS: updated core to allow achievements - thx @Jamiras
 - AUTORUN: better hexagon DSK detection
 - CORE: removed unused old cpccat

libretro/libretro-core.h

@@ -47,7 +47,7 @@
 #include <stdio.h>
 #include <stdbool.h>
 
-#define VERSION_STRING "4.5.2"
+#define VERSION_STRING "4.5.3"
 
 // DEVICE AMSTRAD
 #define RETRO_DEVICE_AMSTRAD_KEYBOARD RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_KEYBOARD, 0)