Resize fails after Pica gets updated beyond 4.0.1 

The Plunkr is also currently broken due to this.

If Pica gets to 4.1.0 - the resizing will fail:

`
Resize exact crop error: {resizedFile: File(1486333), reason: TypeError: Cannot read property 'toBlob' of undefined
    at eval (https://unpkg.com/ng2-pica/dist/b…, error: "PICA_ERROR"}
`

To fix this, one can manually install Pica 4.0.1 instead. Will work again.