Add draft package.json with semver (see #24)

In response to #24 and my own suggestion on #13 I put together an incomplete `package.json` and did an `npm publish` to claim the name `fantasy-land` and added `puffnfresh` as another owner.

I know could just push this, but I like pull requests as a focal point for discussion, even post-merge. In particular, this might be a good place for people to suggest more interesting keywords or bits of `package.json` that I don't know about (some, like `scripts` and `devDependencies` are omitted simply because they are not fully baked)