Update composer.json suggests.

Maikuolan · Maikuolan · commit ed3286ea1ced · 2021-10-31T16:01:11.000+08:00
diff --git a/composer.json b/composer.json
@@ -17,7 +17,7 @@
         "ext-pcre": "*"
     },
     "suggest": {
-        "ext-apcu": "*",
+        "ext-apcu": ">=4",
         "ext-bz2": "*",
         "ext-curl": "*",
         "ext-lzf": "*",
