Use jquery-file-upload module from npm (instead of composer)

* the jquery-file-upload module is now loaded via npm which does not contain the offensive php code
* this also fixes the issue of the mw /vendor directory being blocked and the module therefore not being loadable directly (e.g. in debug=true mode)

Fixes #19
Fixes issue introduced into MediaWiki 1.27.4/1.28.3/1.29.2/1.30 and up with https://phabricator.wikimedia.org/T180231

composer.json

@@ -26,7 +26,6 @@
 	"require": {
 		"php": ">=5.4",
 		"mediawiki/mediawiki": ">=1.26",
-		"blueimp/jquery-file-upload": "~9.12",
 		"composer/installers": "1.*,>=1.0.1"
 	},
 	"autoload": {

extension.json

@@ -1,6 +1,6 @@
 {
 	"name": "SimpleBatchUpload",
-	"version": "1.3.1",
+	"version": "1.3.2-alpha",
 	"author": [
 		"[http://www.mediawiki.org/wiki/User:F.trott Stephan Gambke]"
 	],