Qtrade

In this release I am adding a new method: `get_account_executions` that enables, like the name says, to get all executions for an account. Thanks to john9909 for requesting this.

Further, this release includes nicer error handling for requesting historical data with the wrong granularity. Thank you to Surohitt for the contribution.

Further, I updated the pre-commit hooks and added Python 3.12 as a Python version to test against.

In this release I have a small improvement that closes the session when an instance of the `Questrade`-class is deleted as well as a unit test for it. Thanks to ceprio for suggesting a fix.

Further, I finally moved the CI pipeline from Travis to GH Actions and added an automatic doc build action that saves me the hassle of doing it manually.

This release is a little bit delayed as I had actually added the new method quite a while ago, but here it is! In this release I have added a new method called `get_account_balances`. It will retrieve the balances of all accounts linked to the user. The API description can be found in the docs. Thanks to eshinhw for suggesting the addition.

In this hotfix release we fixed a bug when using a custom path for the credentials yaml-file.

Special thanks to ajhpark for finding and fixing the bug.

In this release we have added two new option methods: `get_option_chain` and `get_option_quotes` that will enable users to pull the full option chain or quotes or specific options.

Special thanks go to mmikitka for their contribution of those two new methods.

In this hotfix release I have added flake8, isort and updated the pre-commit hooks. I also added type hints and added mypy to the Travis pipeline. Further, I added testing for Python version 3.6, 3.7 and 3.8 due to the conditional install for the `TypedDict` type that comes with 3.8.