16h OOP: Tokens

[ngjunsiang]

Finally, let's objectify tokens, making a Token class. Our code works fine as it is ... but why work with dicts if an object makes things clearer?

[ngjunsiang]

Start with a Token class:
https://github.com/nyjc-computing/pseudo/blob/31f3928df82253d70042e85cfc5d0f674ad97c0b/lang.py#L1-L14

Replace all our makeToken() calls with Token instantiations: [1c31405], [f40c1c7]

And update all uses of token to convert keys to attributes: [9d0c9da]

Cleanup

Now we can remove unnecessary imports, breaking the cursed dependency of our parser on the scanner: [42e10dc]

And eliminate the Return Stmt, which should have been done a few chapters ago: [0562ab9]

And fix a typo: [b670260]

[ngjunsiang]

And we have Token objects!