Upgrade AWS SDK to v3

[eheikes]

• https://github.com/aws/aws-sdk-js-v3
• https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/migrating-to-v3.html
• https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/welcome.html

[codecov[bot]]

Codecov Report

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

Comparison is base (6d03121) 100.00% compared to head (c91ac3e) 100.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #142 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 12 12 Lines 303 302 -1 ========================================= - Hits 303 302 -1 ``` | [Files](https://app.codecov.io/gh/eheikes/tts/pull/142?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Eric+Heikes) | Coverage Δ | | |---|---|---| | [packages/tts-cli/lib/providers/aws.js](https://app.codecov.io/gh/eheikes/tts/pull/142?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Eric+Heikes#diff-cGFja2FnZXMvdHRzLWNsaS9saWIvcHJvdmlkZXJzL2F3cy5qcw==) | `100.00% <100.00%> (ø)` | |

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[socket-security[bot]]

New, updated, and removed dependencies detected. Learn more about Socket for GitHub ↗︎

Packages	Version	New capabilities	Transitives	Size	Publisher
zen-observable	0.10.0	None	+0	67.5 kB	zenparsing
@aws-sdk/client-polly	3.441.0	network, filesystem, shell, environment	+73	4.26 MB	aws-sdk-bot
jasmine	2.99.0...3.99.0	None	+1/-2	475 kB	sgravrock

🚮 Removed packages: aws-sdk@2.1360.0