Rework all known column data types

[jasonmccreary]

Given the rise in bugs related to the faker data when generating model factories, I revisited all column types in Laravel to ensure they are covered.

Some notable changes:

• Stricter numeric ranges for integer types, with special logic to properly handle signed and unsigned values
• uuid columns only assume a belongsTo relationship if the column name ends with the Laravel convention of _id.
• The default data type will now be word to prevent invalid code generation (i.e. $faker->,)

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Closes #261