Replace this in function expressions in object properties

[SarahIsWeird]

Fixes #256.

hsm minify game-scripts-tests/this_in_lambda_object.ts:

(Please note the gazillion lets are unrelated to this and also happened before. Opening a new issue for that)

function({ expect }) { let _0r9s8yrtnh2_THIS_ let _0qaqlusuq93_THIS_ let _09o8urfmvr2_THIS_ let _0msk5ver1n0_THIS_ let _12xk01szpo4_THIS_ let _0rlmat2fi08_THIS_ let myObject = (_0rlmat2fi08_THIS_ = _12xk01szpo4_THIS_ = _0msk5ver1n0_THIS_ = _09o8urfmvr2_THIS_ = _0qaqlusuq93_THIS_ = _0r9s8yrtnh2_THIS_ = { a: 0, b() { _0rlmat2fi08_THIS_.a++ return _0rlmat2fi08_THIS_.a }, c: function (value = _12xk01szpo4_THIS_.a) { _0msk5ver1n0_THIS_.a = value + 1 }, d: function ({ value = _09o8urfmvr2_THIS_.a }) { _0qaqlusuq93_THIS_.a = value + 1 }, f() { return _0r9s8yrtnh2_THIS_.a } }) expect(myObject.a).toBe(0) myObject.b() expect(myObject.a).toBe(1) myObject.c() expect(myObject.a).toBe(2) myObject.d({}) expect(myObject.a).toBe(3) }