Fix typo in method name.
Merge pull request #2615 from franzliedke/patch-15

Fix typo in method name.
Added firstOrFail to belongsToMany.
Fix translator bug.
New 'nullableTimestamps' method on Schema builder.
Add more operators for various databases.
Don't break UTF-8 strings on obfuscate.
Added 'extend' alias method for 'addConnector' in QueueManager class.
Merge branch '4.0'