v1.0.4: Initialization Errors are More Polite

This is a minor release with a few small improvements.

Most commits in this release are related to generating wheels and have no effect on the library in use. Thanks to @odidev for adding aarch64 support (#66).

One change is that errors at initialization time now throw a RuntimeError instead of writing directly to stdout. Thanks to @eggplants for pointing out that the current behavior was undesirable (#67).

A small documentation change is a note about the top-level MeCab.VERSION attribute. This refers to the version of the MeCab binary, not this package, and so it's been 0.996 for years, and is not likely to be useful. It's being kept around now for compatibility purposes. Thanks to @rggdmonk for pointing this out (#68).