Proposing a PR to fix a few small typos

[timgates42]

Issue Type

[x] Bug (Typo)

Steps to Replicate and Expected Behaviour

• Examine tests/test_channels.py, tests/test_chats.py, tests/test_devices.py and observe intersted, however expect to see interested.
• Examine readme.md and observe terminilogy, however expect to see terminology.
• Examine readme.md and observe supportes, however expect to see supports.
• Examine readme.md and observe seperatly, however expect to see separately.
• Examine readme.md and observe documetation, however expect to see documentation.

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. Alternatively if the fix is undesired please close the issue with a small comment about the reasoning.

https://github.com/timgates42/pushbullet.py/pull/new/bugfix_typos

Thanks.