The "no change fees" benefit has been extended to September 30; The "voucher" benefit only goes through June 30 (so far).

I have a flight in September that I would like to turn into a 110% voucher (while praying that Are Lingus stays afloat). I'd rather have a refund but am nervous about waiting to see if the flight is actually cancelled.

From their website:

Changing your flights

We know that there's a lot of uncertainty about travel right now and we understand your concerns. We're offering two options:

1. Change your flight without a fee

If you're scheduled to fly with us before 30 September 2020, you can change the date of your trip using the Manage Trip section. We've waived our change fees, but please note that a fare difference may apply.

2. Apply for a voucher

If you're scheduled to fly with us before 30 June 2020, you can apply for a voucher, plus an extra 10%. Apply for this by filling in your details on the voucher request form. We'll send you a voucher for the full value of your flight (including taxes and charges), plus an extra 10%. So if your flight cost at total of €200, we'll send you a €220 voucher.