Bump cordova-plugin-file dependency to 6.0.0
diff --git a/plugin.xml b/plugin.xml
index c3b3f83..17933aa 100644
--- a/plugin.xml
+++ b/plugin.xml
@@ -34,7 +34,7 @@
         <engine name="cordova-android" version=">=6.3.0" />
     </engines>
 
-    <dependency id="cordova-plugin-file" version="^5.0.0" />
+    <dependency id="cordova-plugin-file" version="^6.0.0" />
 
     <js-module src="www/MediaError.js" name="MediaError">
         <clobbers target="window.MediaError" />