Proposing a PR to fix a few small typos

[timgates42]

Issue Type

[x] Bug (Typo)

Steps to Replicate and Expected Behaviour

• Examine digitalocean/Domain.py search for doamin however expect to see domain.
• Examine digitalocean/VPC.py search for boolen however expect to see boolean.
• Examine digitalocean/LoadBalancer.py search for attributues however expect to see attributes.
• Examine README.md search for advandtage however expect to see advantage.

Notes

Semi-automated issue generated by
https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md

To avoid wasting CI processing resources a branch with the fix has been
prepared but a pull request has not yet been created. A pull request fixing
the issue can be prepared from the link below, feel free to create it or
request @timgates42 create the PR.

https://github.com/timgates42/python-digitalocean/pull/new/bugfix_typos

Thanks.