Virustotal-python

* chore(deps): Update all dependencies.
* chore: update license year.

* chore(deps): Update all dependencies.

* chore(deps): Update all dependencies.

Breaking Changes

* The `Virustotal` class now defaults to version 3 of the VirusTotal API.

* Dropped support for `COMPATIBILITY_ENABLED` parameter on the `Virustotal` class.

Docs

* Updated README content including instructions for running tests and improve general readability.

* Moved to using Google docstring format.

* Improved type hints.

* Refactored examples to favour version 3 of the VirusTotal API.

* Added a proper CHANGELOG.

Tests

* Added new unit tests with 95% coverage.

Misc Changes

* `API_VERSION` can now accept an `int` to specify VirusTotal API version to use.

* Add GitHub actions workflows for automated testing and publishing.

Added `large_file` parameter to `request` so a file larger than 32MB can be submitted for analysis. See [33](https://github.com/dbrennand/virustotal-python/pull/33). Thank you smk762.

Update urllib3 to 1.26.5 to address [CVE-2021-33503](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33503).