Update `setup.py` Status and Supported Versions

[SpicyGarlicAlbacoreRoll]

• dev status now Production/Stable
• adds python versions 10-12 to supported versions list

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 88.83%. Comparing base (564899d) to head (57b9079).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #299 +/- ## ======================================= Coverage 88.83% 88.83% ======================================= Files 70 70 Lines 2534 2534 ======================================= Hits 2251 2251 Misses 283 283 ``` | [Flag](https://app.codecov.io/gh/asfadmin/Discovery-asf_search/pull/299/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=asfadmin) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/asfadmin/Discovery-asf_search/pull/299/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=asfadmin) | `88.83% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=asfadmin#carryforward-flags-in-the-pull-request-comment) to find out more.

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