Add max_run_slots argument to autoscaling method

[dpguthrie]

Closes #62

[codecov[bot]]

Codecov Report

Base: 85.80% // Head: 85.80% // No change to project coverage :thumbsup:

Coverage data is based on head (ebc2b21) compared to base (6e2c09b). Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #64 +/- ## ======================================= Coverage 85.80% 85.80% ======================================= Files 14 14 Lines 1353 1353 ======================================= Hits 1161 1161 Misses 192 192 ``` | [Impacted Files](https://codecov.io/gh/dpguthrie/dbtc/pull/64?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Doug+Guthrie) | Coverage Δ | | |---|---|---| | [dbtc/cli.py](https://codecov.io/gh/dpguthrie/dbtc/pull/64?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Doug+Guthrie#diff-ZGJ0Yy9jbGkucHk=) | `72.20% <ø> (ø)` | | | [dbtc/client/admin.py](https://codecov.io/gh/dpguthrie/dbtc/pull/64?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Doug+Guthrie#diff-ZGJ0Yy9jbGllbnQvYWRtaW4ucHk=) | `74.52% <0.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Doug+Guthrie). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Doug+Guthrie)

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[dluftspring]

Hey @dpguthrie we'd like to use this any idea when you plan on releasing? Also if there's any help you need getting to this finish line i'd be happy to help

[dpguthrie]

Hey @dluftspring - sorry about the late response here. I'll try and get this into a new release in the next few days. Apologize for the delay!

[dpguthrie]

@dluftspring This should be available in 0.3.7