MOBILE-2915 config: Revert file-opener to 2.0.19

Author: dpalou

config.xml

@@ -124,7 +124,7 @@
     </plugin>
     <plugin name="cordova-plugin-device" spec="2.0.2" />
     <plugin name="cordova-plugin-file" spec="6.0.1" />
-    <plugin name="cordova-plugin-file-opener2" spec="2.2.0" />
+    <plugin name="cordova-plugin-file-opener2" spec="2.0.19" />
     <plugin name="cordova-plugin-file-transfer" spec="1.7.1" />
     <plugin name="cordova-plugin-globalization" spec="1.11.0" />
     <plugin name="cordova-plugin-inappbrowser" spec="3.0.0" />