feat: add filecoin to CLI, Filecoin.ChainNotify method, and Filecoin support for websockets/subscriptions

[mikeseese]

This PR is a continuation of both #767 (which was a continuation of #726) and #712. Here is what this PR adds:

• Add the Filecoin package to the CLI interface properly
  • This includes keeping the @ganache/filecoin package as a peerDependency for @ganache/flavors and failing if the package cannot be found
  • This peer dependency architecture required me to provide separate type declarations to prevent a circular dependency. I have a strong feeling @davidmurdoch will not be a fan of this, but I believe this is the only setup that will work in production. I could be wrong and am open to alternatives. I provided a root script tsc.filecoin.declarations to allow for quick ease and file cleaning via pretty-quick
  • Neither of these two things (root linking script and type declaration generation) are currently automated (meaning the developer has to call them when they need it). I'm not sure if/who you want this in your development process, so I left it out as it's a trivial thing to setup later. I can do this if you let me know what the desired dev experience should be.
• Preliminary reorganization of tests in @ganache/filecoin. This branch also fixes existing tests.
• Some other minor housekeeping stuff (some code styling, etc)
• Supports the Chain Explorer feature in the https://github.com/filecoin-shipyard/filecoin-network-inspector example
• Adds support for truffle preserve
• Corrects all of the Filecoin types to be consistent with the Filecoin API v1.4.0

It working with the Chain Explorer:

It working with truffle preserve:

[davidmurdoch]

This is a partial review. I just want to get this feedback to you sooner rather than later.

[tcoulter]

Lots of awesome work here, and it's great to see this progressing. Aside, it's super cool you got Websockets in there.

I made a handful of comments. The majority of them are related to code style for one specific pattern you use within the code. Would love for you to change that. The rest are questions.

Thanks again!

[mikeseese]

@tcoulter approved this on Slack