Vcrpy

Fix logo alignment for PyPI release

- Remove Python2 support (hugovk)
- Add Python 3.8 TravisCI support (neozenith)
- Updated the logo to a modern material design (sean0x42)

- **This release is a breaking change** as it changes how `aiohttp` follows redirects and your cassettes may need to be re-recorded with this update.
- Fix multiple requests being replayed per single request in `aiohttp` stub 495 (nickdirienzo)
- Add support for request_info on mocked responses in `aiohttp` stub 495 (nickdirienzo)
- doc: fixed variable name (a -> cass) in an example for rewind 492 (yarikoptic)

- 2.1.1
- Format code with black (neozenith)
- Use latest pypy3 in Travis (hugovk)
- Improve documentation about custom matchers (gward)
- Fix exception when body is empty (keithprickett)
- Add `pytest-recording` to the documentation as an alternative Pytest plugin (Stranger6667)
- Fix yarl and python3.5 version issue (neozenith)
- Fix header matcher for boto3 - fixes 474 (simahawk)

Updates

- Add a rewind method to reset a cassette (thanks khamidou)
- New error message with more details on why the cassette failed to play a request (thanks arthurHamon2, neozenith)
- Handle connect tunnel URI (thanks jeking3)
- Add code coverage to the project (thanks neozenith)
- Drop support to python 3.4
- Add deprecation warning on python 2.7, next major release will drop python 2.7 support

Fixes
- Fix build problems on requests tests (thanks to dunossauro)
- Fix matching on 'body' failing when Unicode symbols are present in them (thanks valgur)
- Fix bugs on aiohttp integration (thanks graingert, steinnes, stj, lamenezes, lmazuel)
- Fix Biopython incompatibility (thanks rishab121)
- Fix Boto3 integration (thanks 1oglop1, arthurHamon2)

- Support python 3.7 (fix httplib2 and urllib2, thanks felixonmars)
- [356] Fixes `before_record_response` so the original response isn't changed (thanks kgraves)
- Fix requests stub when using proxy (thanks samuelfekete daneoshiga)
- (only for aiohttp stub) Drop support to python 3.4 asyncio.coroutine (aiohttp doesn't support python it anymore)
- Fix aiohttp stub to work with aiohttp client (thanks stj)
- Fix aiohttp stub to accept content type passed
- Improve docs (thanks adamchainz)