.jshintrc

rust-cpython: leverage RefCell::borrow() to guarantee there's no mutable ref

Since the underlying value can't be mutably borrowed by PyLeaked, we don't
have to manage yet another mutably-borrowed state. We can just rely on the
RefCell implementation.

Maybe we can add try_leak_immutable(), but this patch doesn't in order to
keep the patch series not too long.

{
    // Enforcing
    "eqeqeq"        : true,     // true: Require triple equals (===) for comparison
    "forin"         : true,     // true: Require filtering for..in loops with obj.hasOwnProperty()
    "freeze"        : true,     // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
    "nonbsp"        : true,     // true: Prohibit "non-breaking whitespace" characters.
    "undef"         : true,     // true: Require all non-global variables to be declared (prevents global leaks)

    // Environments
    "browser"       : true      // Web Browser (window, document, etc)
}