Added missing period to suggest

Author: GrahamCampbell

src/Illuminate/Filesystem/composer.json

@@ -34,7 +34,7 @@
         "league/flysystem-aws-s3-v3": "Required to use the Flysystem S3 driver (^1.0).",
         "league/flysystem-cached-adapter": "Required to use the Flysystem cache (^1.0).",
         "league/flysystem-sftp": "Required to use the Flysystem SFTP driver (^1.0).",
-        "psr/http-message": "Required to allow Storage::put to accept a StreamInterface (^1.0)"
+        "psr/http-message": "Required to allow Storage::put to accept a StreamInterface (^1.0)."
     },
     "config": {
         "sort-packages": true