Fixed the encrypter
[4.2] Fixes mutators implementation when $mutatorCache for given class
is not available.

Solves #6769

Signed-off-by: crynobone <crynobone@gmail.com>
Additional fixes based on comment.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge pull request #6771 from GrahamForks/4.2-fix

[4.2] Fixed The Encrypter
Merge pull request #6773 from crynobone/patch/mutator

[4.2] Fixes mutators implementation when $mutatorCache for given class is not available.
Spacing.
Use asset.
Tweak how key is checked.
Remove old tests.
Tag a new version.
Comment out for now. Will document in documentation.
Remove check.
Increment version.
Reverse change that has caused ridiculous problems.
Increment version.
Comment out weird test for now.
Edited comment
Merge pull request #6790 from Sjoekoe/patch-2

[4.2] Fixed A Typo
Fix comment.