Update React peerDependency range #2

[shiueo]

This PR updates the react peerDependency to allow React 19 ("react": ">=15.3.2 <20").

This is a follow-up to #39, and it also addresses #86, where support for newer versions of React is requested.

Updating this range allows projects using React 19 to install react-katex without peer dependency warnings

Test Results

--------------------|---------|----------|---------|---------|-------------------
File                | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
--------------------|---------|----------|---------|---------|-------------------
All files           |    98.8 |      100 |     100 |   98.68 |                   
 src                |      96 |      100 |     100 |   95.65 |                   
  index.jsx         |      96 |      100 |     100 |   95.65 | 53                
 tests              |     100 |      100 |     100 |     100 |                   
  sharedExamples.js |     100 |      100 |     100 |     100 |                   
--------------------|---------|----------|---------|---------|-------------------

Test Suites: 2 passed, 2 total
Tests:       24 passed, 24 total
Snapshots:   0 total
Time:        1.828 s
Ran all test suites.

You can view the full test log for this PR here. (Tested via Github CI.)

I have been using React 19 with react-katex for several months without encountering any issues!

[thiagoloureiro]

@talyssonoc help us :)

[thiagoloureiro]

thanks Talysson! you plan to deploy to npm?

[talyssonoc]

Yes! I will first release a version just with this change, and then I plan to do a revamp on the dependencies of the project :)

[thiagoloureiro]

sounds fantastic! will keep an eye here, obrigado!!

[talyssonoc]

Just published :)