Feature: show update notif in panel

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
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# On branch hossein/admin-notice
# Changes to be committed:
#	modified:   DPGateway.php
#	new file:   includes/update.php
#	modified:   index.php
#	modified:   wc-dp-gateway.php
#