Fix indexing

[RaphaelPour]

Indexing with hashes and arrays are not working:

🚀 > h = {}
=> {}
🚀 > h["a"] = 1
🔥 Great, you broke it!
 parser errors:
         0:10: expected assign token to be IDENT, got [ instead

🚀 > a = []
=> []
🚀 > a.yoink(0)
=> null
🚀 > a[0] = 1
🔥 Great, you broke it!
 parser errors:
         0:6: expected assign token to be IDENT, got [ instead

[Flipez]

I think @MarkusFreitag fixed this with #80 ?

[Flipez]

Fixed in #80