chore: drop xtend dependency (#1352)

Author: wojtekmaj

lib/make-middleware.js

@@ -1,6 +1,5 @@
 var is = require('type-is')
 var Busboy = require('busboy')
-var extend = require('xtend')
 var appendField = require('append-field')
 
 var Counter = require('./counter')
@@ -158,7 +157,7 @@ function makeMiddleware (setup) {
         storage._handleFile(req, file, function (err, info) {
           if (aborting) {
             appender.removePlaceholder(placeholder)
-            uploadedFiles.push(extend(file, info))
+            uploadedFiles.push({ ...file, ...info })
             return pendingWrites.decrement()
           }
 
@@ -168,7 +167,7 @@ function makeMiddleware (setup) {
             return abortWithError(err)
           }
 
-          var fileInfo = extend(file, info)
+          var fileInfo = { ...file, ...info }
 
           appender.replacePlaceholder(placeholder, fileInfo)
           uploadedFiles.push(fileInfo)

package.json

@@ -26,8 +26,7 @@
     "append-field": "^1.0.0",
     "busboy": "^1.6.0",
     "concat-stream": "^2.0.0",
-    "type-is": "^1.6.18",
-    "xtend": "^4.0.2"
+    "type-is": "^1.6.18"
   },
   "devDependencies": {
     "deep-equal": "^2.0.3",