WebAudio: Fix deprecated macros with emscripten 5.0.1+

[FloRecisio]

Hello :) This PR fixes the warnings introduced in Emscripten 5.0.1

miniaudio.h:41459:6: error: macro '__EMSCRIPTEN_major__' has been marked as deprecated: Use __EMSCRIPTEN_MAJOR__ instead [-Werror,-Wdeprecated-pragma]
miniaudio.h:41459:66: error: macro '__EMSCRIPTEN_minor__' has been marked as deprecated: Use __EMSCRIPTEN_MINOR__ instead [-Werror,-Wdeprecated-pragma]
miniaudio.h:41459:124: error: macro '__EMSCRIPTEN_tiny__' has been marked as deprecated: Use __EMSCRIPTEN_TINY__ instead [-Werror,-Wdeprecated-pragma]

[FloRecisio]

I don't know if this is the best fix because it probably won't compile in earlier versions... maybe I should just ignore the warning on my end.
emscripten-core/emscripten@4cce5e9

[mackron]

Thanks for the heads up on this. I don't want to break the build just yet, so I think what I might do is have a MA_EMSCRIPTEN_MAJOR, etc. which wraps around __EMSCRIPTEN_MAJOR/major__ depending on what's available. I can do that manually. Will leave this PR open as a reminder.

An FYI for your own future reference, the split version is created with a tool so no need to duplicate the change there, nor do I accept manual changes to it. No need to update the PR or anything - I'll make this change manually.

[mackron]

This should be addressed in the dev branch. If you were needing this in the split version you can just keep your local changes for the time being, or you can wait until I do the next release.