Use input() to get page number

Restricting page numbers to `$request->query->get()` makes it very hard to make api end points which can accept a big amount of filters via an HTTP request because there are several different limitations on how a GET request can function. Allowing current-page to be accessible via `$request->input()` makes it very easy to just send the page number along with a big post-data of all the filters.
Update change log.
Added 4.2 to splits.
update contributing.md
Merge pull request #4383 from veelasky/patch-2

update contributing.md
Merge pull request #4381 from kapv89/patch-9

Use input() to get page number
Merge branch '4.1' into 4.2
Whoops 1.1 update
Use ConfirmableTrait in Seeder

Just like migrations
Force the seeding

Otherwise it has to be confirmed twice.
Merge pull request #4378 from GrahamCampbell/4.2-whoops

[4.2] Updated Whoops
Merge pull request #4392 from barryvdh/patch-1

use ConfirmableTrait in db:seed
Fix array call.
Update Symfony displayer.
Use symfony exception handler because of broken Whoops.
Revert "Use symfony exception handler because of broken Whoops."

This reverts commit c8d31238ec5ee40b9c46c1ab66138a47d2cc745a.
Fixed file permissions
add helper method for using error_log
Merge pull request #4406 from alprs/feature/error-log-handler

[4.2] Enable easier usage of error_log in Log\Writer
move remindabletrait into reminders namespace.