Migration ganeration, if dbType does not include ":".

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.

laravel-generator/src/Common/GeneratorField.php

Lines 35 to 40 in 8575e2b

    
           if (!Str::contains($dbInput, ':')) { 
        
               $this->dbType = $dbInput; 
        
               $this->prepareMigrationText(); 
        
               return; 
        
           }

Thanks.

@msksbt Good Catch. Feel free to put a PR if you can, or I will take care of it by this week.

@mitulgolakiya OK. I will try to fix and PR. thanks.

	if (!Str::contains($dbInput, ':')) {
	$this->dbType = $dbInput;
	$this->prepareMigrationText();

	return;
	}