Update composer.json

composer.json

@@ -1,6 +1,6 @@
 {
     "name": "box/spout",
-    "description": "PHP Library to read and write CSV, XLSX and ODS files, in a fast and scalable way",
+    "description": "PHP Library to read and write spreadsheet files (CSV, XLSX and ODS), in a fast and scalable way",
     "type": "library",
     "keywords": ["php","read","write","csv","xlsx","ods","odf","open","office","excel","spreadsheet","scale","memory","stream","ooxml"],
     "license": "Apache-2.0",