Added ability to manually set created at date

[chrisrhymes]

First, just wanted to say this is a great package, but I was wondering if it is possible to set a custom created_at date for an activity? My initial use case was actually for testing as I want to test my application logic where it will not send a notification if there is an existing "reminder" activity within the last 2 weeks.

The way I got around this in the unit test is to use the following:

$now = now();
Carbon::setTestNow(now()->subDays(15));
activity()->performedOn($model)->log('reminder');
Carbon::setTestNow($now);

But I thought it would be nice to do something like this to specify the log created at date:

activity()->performedOn($model)->createdAt(now()->subDays(15))->log('reminder');

// or
activity()->performedOn($model)->at(now()->subDays(15))->log('reminder');

This could be useful for manually logging activities that are not captured in the system (something done "offline") at a different date/time than the user logs it in the system.

[Gummibeer]

Thanks for this complete PR - including documentation and test! 😊

[Gummibeer]

Thanks - I will release it during this week.

[ArnaudLier]

@Gummibeer The week's a little overwhelming

[Gummibeer]

@chrisrhymes sorry for the delay! And @ZeProf2Code thanks for the reminder.
Sometimes it's hard to keep track of open tasks.
https://github.com/spatie/laravel-activitylog/releases/tag/3.10.0