fix: disable the emscriptem error handler

[rtpg]

This makes the following stack trace legible, instead of printing out all of the viz.js source code

fixes #32

% cat test.js
import vizRenderSync from "@aduh95/viz.js/sync";

function f() {
  return (undefined).a.b
}

f()

[0] % node test.js
file:///home/rtpg/proj/viz.js/test.js:4
  return (undefined).a.b
                     ^

TypeError: Cannot read property 'a' of undefined
    at f (file:///home/rtpg/proj/viz.js/test.js:4:22)
    at file:///home/rtpg/proj/viz.js/test.js:7:1
    at ModuleJob.run (internal/modules/esm/module_job.js:183:25)
    at async Loader.import (internal/modules/esm/loader.js:178:24)
    at async Object.loadESM (internal/process/esm_loader.js:68:5)