It's already the case if you want to buy them all ( the 2020 ones ). It's in a bundle for 14.90$ ( all 2020 at the same time ) => click on one animation in the 2020 collection and you should see the bundle buy button -> 'buy this product and 22 more...' something like that.
Here is the link, it shows all that you get in this bundle ( for 2020 ) : https://itch.io/s/43575/2020-animations-pack-for-vx-ace-mv-mz-