Increase video upload file size

[r0b0t3d]

First, thanks for your effort to keep this lib being maintained.
Currently, video size limit is 5MB

twitter-kit-ios/TwitterKit/TwitterKit/Social/Identity/API Client/TWTRAPIClient.m

Line 269 in ee9a81e

const long long kVideoMaxFileSize = 5 * 1024 * 1024;

Could you increase this size or keep the original size?

Expected behavior

Can upload video with bigger size