More scalar types (`BigInt`, `Char`, `Arrays`, ...)

As systems grow across multiple DB infrastructures we need to be able to ensure data correctness. This can not be done without having a wider set of standard data types in GraphQL. Right now the developer has to add custom types but the developer is usually the weakest link in the system and a simple oversight that would be caught by a type checker can cost millions if we don't have that data type to begin with or isn't configured right. A missing value in an array could offset the contents of a variable causing the wrong data to be stored in a field.

The most useful ones I can think of right now
- BigInt (MYSQL might pass you a int you can't store)
- Double (Important when dealing with money)
- Char (setting genders or storing state abbreviations or foreign postal codes)
- Long/Blob (content and file storage)
- Unique / Auto increment / generated UUIDs
- Multi dimensional Arrays
- Associative Arrays
- Date/Time (most important generating timestamps using server time)

I am sure there are more that are important but I think these are the most commonly used. Which is another reason they should be included instead of everyone having to add them themselves.