Update ABI and API versions

Author: JukkaL

mypyc/lib-rt/librt_base64.h

@@ -12,8 +12,8 @@ import_librt_base64(void)
 
 #else  // MYPYC_EXPERIMENTAL
 
-#define LIBRT_BASE64_ABI_VERSION 0
-#define LIBRT_BASE64_API_VERSION 1
+#define LIBRT_BASE64_ABI_VERSION 1
+#define LIBRT_BASE64_API_VERSION 2
 #define LIBRT_BASE64_API_LEN 4
 
 static void *LibRTBase64_API[LIBRT_BASE64_API_LEN];