Function currentUpgrades

Returns (
    | "leftarm1"
    | "leftleg1"
    | "rightarm1"
    | "rightleg1"
    | "base_blackhat"
    | "cowcatcher"
    | "periscope"
    | "radardish"
    | "dualexhaust"
)[]

An array containing the upgrades that you currently have on your autumn-aton.