v0.5.0: Bug fixes and JavaScript API rework

There was a "0.4.2" which was NPM-only, but this updates all the releases at once.

• Fix a serious bug in state alignment which caused a segfault on align failure.
• Fix serious bugs in the JavaScript API leading to memory exhaustion
• Remove superfluous use of promises/async in some parts of JavaScript API
• Add a (possibly temporary) spectogram API in JavaScript
• Removed some bogus internal APIs

What's Changed

• Increase wheel production and sdist too by @dhdaines in #32
• fix: extremely bogus state align code by @dhdaines in #34
• feat: export Endpointer interface (though it will go away) by @dhdaines in #35
• feat: stricter emcc linker options in external file by @dhdaines in #41
• Remove bogus code by @dhdaines in #42
• Remove unused setjmp/logjmp by @dhdaines in #43
• Fix horrific memory corruption in process() when called with subarrays by @dhdaines in #45
• Add a method to get spectrogram data by @dhdaines in #46
• fix: WTF JavaScript... TypedArray constructor strikes again by @dhdaines in #47
• Avoid overflowing the emscripten stack (WHOOPS) by @dhdaines in #49
• Remove remaining stackAlloc by @dhdaines in #50
• Make the API less asynchronous by @dhdaines in #51
• docs: update js api docs by @dhdaines in #52
• Major JavaScript API cleanup by @dhdaines in #53

Full Changelog: v0.4.1...v0.5.0