Translating Reason from eglish to polish Part 4 (687 words)

Here goes the fourth part of Reason's translation. Reason is a program that lets you write simple, fast and quality type safe code while leveraging both the JavaScript & OCaml ecosystems and I decided to help it with reaching wider audience by contributing to its translation to polish.

In fourth part, I translated 687 words. Here's the proof of my progress:
Before:

After today's translation:

Please look forward to Part 5 of my translation!
Reason on GitHub:
https://github.com/facebook/reason
Reason on CrowdIn:
https://crowdin.com/project/reason
Reason's official website:
https://reasonml.github.io/