updated composer.json for drush

composer.json

@@ -1,5 +1,13 @@
 {
-    "require": {
-        "drush/drush": "8.4.2"
+  "require": {
+    "drush/drush": "~8.0",
+    "webflo/drupal-finder": "^1.0.0"
+  },
+  "extra": {
+    "installer-paths": {
+      ".": [
+        "type:drupal-core"
+      ]
     }
+  }
 }