Update nyc to 13.3.0 to resolve handlebars dependency security concern.

[Jkovarik]

Updated all nyc dependencies to 13.3.0 to address security audit concerns.

See: https://npmjs.com/advisories/755,
istanbuljs/nyc#991

for more information.

[markdboyd]

These changes look good to me.

Are we really not committing lockfiles for any of our packages? We definitely need to start doing that. Probably as part of the effort when we commit fully to npm or yarn (hopefully the former)

[Jkovarik]

These changes look good to me.

Are we really not committing lockfiles for any of our packages? We definitely need to start doing that. Probably as part of the effort when we commit fully to npm or yarn (hopefully the former)

Agreed, and that probably should hasten our decision to do so.