[5.x] Encrypt content attribute at rest

[gawsoftpl]

Pull request for #1532 [Feature] Encryption at the Rest

[crynobone]

Marking this as draft since tests are failing

[taylorotwell]

Thanks for your pull request to Laravel!

Unfortunately, I'm going to delay merging this code for now. To preserve our ability to adequately maintain the framework, we need to be very careful regarding the amount of code we include.

If applicable, please consider releasing your code as a package so that the community can still take advantage of your contributions!

[gawsoftpl]

Thanks for your pull request to Laravel!

Unfortunately, I'm going to delay merging this code for now. To preserve our ability to adequately maintain the framework, we need to be very careful regarding the amount of code we include.

If applicable, please consider releasing your code as a package so that the community can still take advantage of your contributions!

I can create new package. Best way will be use ModelObserver but I dont know why ModelOberser not working with EntryModel.php

Not fired creating hook, retrieved working fine.