Add Missing Methods for Workflows

[Cliftonz]

Some endpoints of the following section can't be hit from this SDK.

We would like to ensure that all endpoints can be hit. For this issue, we would like to build out the Notification templates

Some of these methods may already exist. 
If so no need to change/update them, just point out that they already exist and we will close the issue.

This is just to bring every SDK we have on par with all the methods available.

Check all the endpoints here and add the missing ones.

[srikanth597]

@Cliftonz i will pick this up, none of the Notification API methods have been implemented

[srikanth597]

the swagger shows that its already deprecated and it appears to be renamed as workflows, so this becomes non-relevant

[Cliftonz]

@srikanth597 Thank you for pointing that out. I have switch the name, if you finish the other issue and no one else has claimed this I will assign it to you.

[trishanu-init]

@Cliftonz Please assign me this issue

[srikanth597]

@Cliftonz I have already completed the other Issue, provided the PR reference, waiting for review & merge.
Which is why I was hoping i could do this in the meantime.
Since you have assigned this perhaps i will probably look for something else

[srikanth597]

Since it was un-assigned again, i have picked it up & raised the PR #68 for the same@Cliftonz