restore composer.json, add mysqli extension

public/vendor/fileinput/composer.json

@@ -0,0 +1,36 @@
+{
+    "name": "kartik-v/bootstrap-fileinput",
+    "description": "An enhanced HTML 5 file input for Bootstrap 3.x with features for file preview for many file types, multiple selection, ajax uploads, and more.",
+    "keywords": [
+        "bootstrap",
+        "jquery",
+        "file",
+        "input",
+        "preview",
+        "upload",
+        "image",
+        "multiple",
+        "ajax",
+        "delete",
+        "progress"
+    ],
+    "homepage": "https://github.com/kartik-v/bootstrap-fileinput",
+    "license": "BSD-3-Clause",
+    "authors": [
+        {
+            "name": "Kartik Visweswaran",
+            "email": "kartikv2@gmail.com",
+            "homepage": "http://www.krajee.com/"
+        }
+    ],
+    "autoload": {
+        "psr-4": {
+            "kartik\\plugins\\fileinput\\": ""
+        }
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "5.0.x-dev"
+        }
+    }
+}