Relicense as MIT

[hadley]

I have reviewed all non-RStudio contributors. I think there are only two contributions significant enough to merit a potential copyright claim:

• 2b5330e by @dchiu911
• 264273d by @zkamvar

@dchiu911, @zkamvar would consider giving your permission to relicense tidyverse as MIT? If so, please comment "I agree" below

[zkamvar]

I agree

[dchiu911]

I agree

[hadley]

Thank you!