Update character tables to Unicode 16.

Release 1.3.5.

Release 1.3.4.

Add install-static and install-shared targets.

1.3.2 patch release for UAF bug fix.

Make a patch release for important iterator bug fix.

Bump version number.

Add JS_VERSION_MAJOR/MINOR/PATCH defines to mujs.h

A macro JS_CHECKVERSION(major, minor, patch) can be used to test the
version if your code depends on API features added in a given version.

#if JS_CHECKVERSION(1, 2, 0)
    ... use new API ...
#else
    ... don't use new API ...
#endif

Fix error in Array.prototype.toString().

Fix use-after-free in regexp source property access.

The underlying string of the "source" property of a regular expression
object can be freed if the regexp is garbage collected.

This could lead to a use-after-free, because the accessor incorrectly
assumed that the regexp source was an interned (thus never freed) string.
Fix this by calling js_pushstring instead of the faster but unsafe
js_pushliteral.

Many thanks to Connor Nelson for spotting this!