Browser: Convert all Array to []

[inancgumus]

As discussed here, we want to convert all Array signatures to [] in the k6-browser docs.

It is common to use simple array types in typescript, i.e. Cookie[], for named types:

let a: string[]
let b: boolean[]
let c: SomeInterface[]

The generic version is usually reserved for more complex types, where the brackets might be easy to miss due to the amount of symbols:

let a1: Promise<({ prop: boolean })[]>
// vs.
let a2: Promise<Array<{ prop: boolean }>>

let b1: Promise<(typeof myVal)[]>
// vs.
let b2: Promise<Array<typeof myVal>>

Ups

• Promise<Inner[]> is easier to read than Promise<Array<Inner>>. The eye does not need to match opening and closing braces.
• The bracket syntax is ubiquitous in programming, whereas generics are an advanced feature and the syntax is more varied.

Downs

• Slightly mismatching with PW (i.e., see this). However, improved readability outweighs being consistent with PW's docs. It also appears to be a convention we've used in the type definitions.