From v14 to v15

Upgrade PHP to 8.0
Execute php artisan bjyblog:update command

From v6 to v14

Upgrade PHP to 7.3
Execute php artisan bjyblog:update command

From v5.8 to v6

Upgrade PHP to 7.2
Execute php artisan bjyblog:update command

From v5.5 to v5.8

Upgrade PHP to 7.1
Execute php artisan bjyblog:update command

From v1 to v5.5

Upgrade PHP to 7.0
Change the type of the markdown and html column of table articles from text to mediumtext
Execute php artisan bjyblog:update command