dep: explicitly require php-json ext

mle86 · mle86 · commit 866f9a7f9015 · 2019-10-23T21:15:35.000+02:00
diff --git a/composer.json b/composer.json
@@ -28,6 +28,7 @@
   },
 
   "require": {
+    "ext-json": "*",
     "php": ">=7.0.0"
   },
 
