Add retries to get features

[janboll]

Description

Create session and provide it with a custom HTTPAdapter, that has max_retries set.

Fixes #217

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

• Unit tests
• Spec Tests
• Integration tests / Manual Tests

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[coveralls]

Coverage increased (+0.04%) to 96.196% when pulling 45d76eb on janboll:add-retries into 615ca5b on Unleash:main.

[sighphyre]

Awesome, really appreciate you running with this.

This looks good to me!

[ilee-asapp]

Sorry, I've been on vacation and am slowly catching up with life. >_O

I'll take a peek at the CI/CD failure tonight and cut a release once that's fixed!

[povilasb]

Thank you!
I'm eagerly waiting for this to be released :)

[ivanklee86]

This PR is in v5.3.0 which is up on Pypi now! :)

[povilasb]

Would be cool to retry all HTTP requests coming from this lib btw :)
e.g. metrics reporting: https://github.com/Unleash/unleash-client-python/blob/1861dd9ced7bf1d4c45eab949d5250280b9883e7/UnleashClient/api/metrics.py#L28