all: upgrade bulma and moment.js versions

[adamdecaf]

A dependency bot on my projects noticed these were out of date. I created a new example and the site loads fine for me.

I also had to update elazarl/go-bindata-assetfs to properly bundle the assets.

Context: https://github.com/moov-io/SOC2/pull/11, https://github.com/moov-io/SOC2/pull/12, and https://github.com/moov-io/SOC2/pull/13