Add support for React 19

[Kaishiyoku]

react-blurhash breaks when using React 19 with BlurhashCanvas:

node_modules/react-blurhash/dist/index.d.ts:22:15 - error TS2503: Cannot find namespace 'JSX'.

22     render(): JSX.Element;
                 ~~~

node_modules/react-blurhash/dist/index.d.ts:40:15 - error TS2503: Cannot find namespace 'JSX'.

40     render(): JSX.Element;
                 ~~~


Found 2 errors in the same file, starting at: node_modules/react-blurhash/dist/index.d.ts:22

[BearCooder]

Hey @nygardk, @Thisen, @muescha or @chentsulin could you please add the support for React 19?
Would be great to get a new version (0.4.0?) with all the others dependencies updated too.
Thank you for your work!

[BearCooder]

This package has over 100k downloads per month