Modal with Legacy context api and findDOMNode warnings on console when open

[hermeshcg]

• components: Modal
• reactstrap version "^8.7.1"
• import method umd/csj/es
• react version ^17.0.1
• bootstrap version ^4.5.3

What is happening?

I'm using modal by reactstrap in a project, when this modal is open it appears a few warnings in the console

What should be happening?

Not showing warnings i guess

Steps to reproduce issue

1. Open console
2. Open an reactstrap modal

Error message in console

Error 1

index.js:1 Warning: Legacy context API has been detected within a strict-mode tree.

The old API will be supported in all 16.x releases, but applications using it should migrate to the new version.

Please update the following components: Transition

Error 2

Warning: findDOMNode is deprecated in StrictMode. findDOMNode was passed an instance of Transition which is inside StrictMode. Instead, add a ref directly to the element you want to reference.

[kyletsang]

Dupe of #1833