code lint fix

[toadkicker]

No description provided.

[toadkicker]

@iurimatias I don't know about this line;

this.solcVersion = options.contractsConfig.versions.solc;

We usually want to avoid deeply nested config objects. This in a constructor so let the calling member do the hard work here.

I suggest we just make a new immutable class that holds version info for us, and that class would have getters/setters that look them up for us.

[iurimatias]

that line is temporary and will be refactored. I didn't want to do have so many changes (+1163/-715) separate from the main branch for so long. I did f'up with the lint/tests though.