Fails on optional properties

[mkatrenik]

It erros on optional properties

interface Foo {
  prop?: number
}

// Error: Failed to generate a codec

[jsphweid]

I made a PR that fixes this (#10 ). Basically, prop?: number is seen as a union of number and undefined, but undefined (type flag 32768) wasn't recognized by this lib.

[ahrjarrett]

We can close this