fix(typegen): array types are `unknown` in computed fields & composite types

[gulfaraz]

What kind of change does this PR introduce?

This PR changes gen:types:typescript to generate types for array types instead of unknown.

What is the current behavior?

// todos
Row: {
    details_words: unknown | null
}

// Functions
details_words: {
    Args: {
        "": unknown
    }
    Returns: unknown
}

Example from #581

CompositeTypes: {
    array_type: {
        my_text_array: unknown
    }
}

What is the new behavior?

// todos
Row: {
    details_words: string[] | null
}

// Functions
details_words: {
    Args: {
        "": unknown
    }
    Returns: string[]
}

CompositeTypes: {
    array_type: {
        my_text_array: string[]
    }
}

[kamilogorek]

LGTM, nice update, thanks! cc @soedirgo

[kamilogorek]

@gulfaraz you don't need to keep the branch up to date. Once person responsible for this repo is back, they'll handle it :)

[gulfaraz]

@kamilogorek Good to know. Thank you.