Typescript definition for font blur has optional property offset, but it is required

[spustlik]

Steps to Reproduce

let font =  fontSource.toFont({
        family: 'pleasantly_plumpnormal',
        color: ex.Color.White,
        shadow: { 
           blur: 5, 
           color: ex.Color.Black, 
           offset: ex.vec(0, 0)  // if ommited, engine will throw error
       }
    })

Expected Result

typescript with required property, or engine accepts undefined

Environment

Excalibur: (v0.30.0-alpha.1053+29fef3b)

Current Workaround

offset: ex.vec(0,0)

[eonarheim]

@spustlik Thanks for the issue, definitely a bug