minor documentation fix

[FredaXin]

The current upper limit of size is "100", not "500". Please see https://www.reddit.com/dev/api/#GET_api_trending_subreddits. Thank you!

[jaens]

Indeed, the limit has been changed from 500 to 100 quite a while ago for eg. /reddit/search/submission, setting a 500 limit will just fetch 100 items.

[arcane-p]

Solves #22, solves #60

Also possibly addresses #79 and #75

[Nasko-5]

if this solves issues why hasn't it been merged yet?

[woot903]

The new comment search size limit is 250 or less.