Add getTail() and reverse() Methods to LinkedList

[RohiniShankari]

The current LinkedList implementation does not include:

A method to return the tail element

A method to reverse the linked list.

I would like contribute these features if iam allowed to..
If approved, I will submit a clean PR.
Thank you!

[eyas-ranjous]

@RohiniShankari hi
do you mean adding tail() to LinkedList, because DoublyLinkedList already have that.
yes reverse is not a bad idea. feel free to submit a PR with its tests and TS types. cheers

[RohiniShankari]

i have submited a PR for reverse functionality(Added reverse() method to LinkedList #39).please review it