Hi, thanks for this awesome project.
( I'm sorry if there are any grammatical mistakes. )

I generated migration from JSON, but it's maked wrong statement.

I tried this:

{
..
    "name": "field_name",
    "dbType": "char,26",
..
}

but, it maked this:

    $table->char,26('field_name');

I think that the problem occurs if dbType does not include ':', and there is a problem in follow clode block,
I tried this block to commented out, then the problem seems to be resolved.

Thanks.