Supports minItems / maxItems

[kgtkr]

example:

// minItems=undefined, maxItems=undefined
type A = X[];

// minItems=1, maxItems=undefined
type B = [X, ...X[]];

// minItems=1, maxItems=3;
type C = [X] | [X, X] | [X, X, X];

// minItems=undefined, maxItems=2;
type D = [] | [X] | [X, X];

• Have to be careful about code sizes that are too large
• The generated code is incompatible and should add an option
• openapi-typescript can put an array in items, but not in openapi3.0