Output semicolons after assignments, to fix ambiguous lua output in some cases

[natnat-mc]

The following code generates invalid lua code:

import bind from grasp
(bind stmt) color: "Red"

local bind
bind = grasp.bind
(bind(stmt))({ -- this is line 99
  color = "Red"
})

The lua interpeter is unable to parse this, because this could be either a new statement or a function call. To fix this, a semicolon would need to be inserted.

Full code this is from: https://gist.github.com/daelvn/3f3677b31af2752992fe16617bba3d2e
Discussion on the MS Discord: https://discordapp.com/channels/454435414044966913/454435533792346142/705499136035651599

This PR aims to fix this by appending a semicolon to all assignments. Sadly, this also changes all files output my moonc and broke all tests based on output string match, which I've patched to accomodate for this change.

[natnat-mc]

See #417, which does this better