search: Whitelisted repohascommitafter to get repo type
Created by: Akarshit
Closes: #6759 The parameter was missing from the whitelist so I just added it back. To test use the following 3 queries:
source repo:^github.com/sourcegraph/ type:repo
source repo:^github.com/sourcegraph/ type:repo repohascommitafter:"1 day ago"
source repo:^github.com/sourcegraph/ type:repo repohascommitafter:"0 day ago"