synchronously recompute value after state change

[leopf]

These changes will allow synchronous updates to computed states. To accomplish this I made the following changes:

• cache if the function is asynchronous
• before computing the value, check if it needs to be computed asynchronously. If not do it synchronously.
• added a test, to test these changes
• fixed some tests, since some methods have changed in usage and naming

📄 Description

Bug fix, see #219

🔴 Related Issue

Related issue #219

📃 Context

Seems to be a bug/missing feature so far.

🛠 How Has This Been Tested?

Added a new test to "computed.test.ts" to verify that the changes work.

[bennobuilder]

I appreciate your work very much. 🙏👍
Would you mind changing the target branch to the devlop branch?
The master branch is for releases only.

See CONTRIBUTING.md Branch-Organization

Thanks a lot ;D

[leopf]

Sorry about that!

Thanks for creating this project! It solves a lot of problems for me, without having to do it all myself.
You will probably hear from me again! 😉