refactor: rename constant LIBZSTD_VERSION_NUMBER -> ZSTD_VERSION_NUMBER

Author: kjdev

tests/dictionary_02.phpt

@@ -2,7 +2,7 @@
 zstd_uncompress_dict(): streaming decompression with dictionary
 --SKIPIF--
 <?php
-if (LIBZSTD_VERSION_NUMBER < 10304) die("skip needs libzstd 1.3.4");
+if (ZSTD_VERSION_NUMBER < 10304) die("skip needs libzstd 1.3.4");
 ?>
 --FILE--
 <?php

zstd.c

@@ -1631,7 +1631,7 @@ ZEND_MINIT_FUNCTION(zstd)
                            ZSTD_CLEVEL_DEFAULT,
                            CONST_CS | CONST_PERSISTENT);
 
-    REGISTER_LONG_CONSTANT("LIBZSTD_VERSION_NUMBER",
+    REGISTER_LONG_CONSTANT("ZSTD_VERSION_NUMBER",
                            ZSTD_VERSION_NUMBER,
                            CONST_CS | CONST_PERSISTENT);
     REGISTER_STRING_CONSTANT("LIBZSTD_VERSION_STRING",