Minor update which allows vpkg to compile and run with v0.2 of V

[islonely]

A basic summary of what I did is: I added or{...} blocks to the code where required. And lock is apparently a keyword now, so I replaced every lock Lockfile with lf Lockfile in lockfile.v. In struct Package {...} I replaced ...string = '' with ...string because the type string now defaults to an empty string. And I think that's about it. You can look over the commits for anything I may have missed.