Hi,
the JsonArray seems to be fine

Elapsed Time :
1508
{"country":"Germany","cases":80641,"todayCases":2660,"deaths":962,"todayDeaths":31,"recovered":19175,"active":60504,"critical":3408,"casesPerOneMillion":962,"deathsPerOneMillion":11}
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When I try to upload your code on my ESP8266 it doesen't work with latest library.
So for my case I make a few changes in corona.ino file
at row 29
lcd.begin(16, 2);

and after that initialize LSD with
lcd.init();

Great work, thanks for sharing. I'm time poor but if you're looking for some feedback/enhancement suggestion :)

Space on LCD limited, but what would be good is an indication on the change since last time

i.e. Cnfirmed 1353 (+22) dths 7 (+2)....

Either alternate display or support 4 line LCD or use a colour LCD?

If I get time I'm going to try, but in case this is a quick job for someone smarter than me :)