added tidyverse contributors

[mattblackwell]

@xiaolong-y @liowyijia @shomiyazaki @annayrzy Can you all take a look at these names in the contributor list to see if I have the information correct? Thanks for all your help on this!

[annayrzy]

@mattblackwell Thank you very much! Could you please change my email address to [email protected], since I just moved to Yale? Everything else looks fine to me.

[liowyijia]

Thank you very much @mattblackwell! Can you change my given name from Claire to Yi Jia please? I would also like to use my Harvard email address [email protected] to keep this separated from my work at UTokyo.

It was nice to meet you in-person the other day🙂

[xiaolong-y]

@mattblackwell Thank you very much! There is no problem on my side. 🙂

[shomiyazaki]

Thank you very much, Professor @mattblackwell ! There is no problem on my side too!