Update npm packages for build

From https://github.com/Duke-GCB/datadelivery-ui/pull/14#issuecomment-396283242

> I noticed some npm warnings when building the docker image:
>
> ```
> npm WARN notice [SECURITY] is-my-json-valid has the following vulnerability: 1 low. Go here for more details: https://nodesecurity.io/advisories?search=is-my-json-valid&version=2.16.1 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> npm WARN notice [SECURITY] ws has the following vulnerability: 1 high. Go here for more details: https://nodesecurity.io/advisories?search=ws&version=1.1.1 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> npm WARN notice [SECURITY] debug has the following vulnerability: 1 low. Go here for more details: https://nodesecurity.io/advisories?search=debug&version=2.3.3 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> npm WARN notice [SECURITY] debug has the following vulnerability: 1 low. Go here for more details: https://nodesecurity.io/advisories?search=debug&version=2.2.0 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> npm WARN notice [SECURITY] debug has the following vulnerability: 1 low. Go here for more details: https://nodesecurity.io/advisories?search=debug&version=2.3.3 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> npm WARN notice [SECURITY] debug has the following vulnerability: 1 low. Go here for more details: https://nodesecurity.io/advisories?search=debug&version=2.3.3 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> npm WARN notice [SECURITY] randomatic has the following vulnerability: 1 low. Go here for more details: https://nodesecurity.io/advisories?search=randomatic&version=1.1.7 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> npm WARN notice [SECURITY] parsejson has the following vulnerability: 1 high. Go here for more details: https://nodesecurity.io/advisories?search=parsejson&version=0.0.3 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> npm WARN notice [SECURITY] lodash has the following vulnerability: 1 low. Go here for more details: https://nodesecurity.io/advisories?search=lodash&version=4.17.4 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> npm WARN notice [SECURITY] lodash has the following vulnerability: 1 low. Go here for more details: https://nodesecurity.io/advisories?search=lodash&version=3.10.1 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> npm WARN notice [SECURITY] minimatch has the following vulnerability: 1 high. Go here for more details: https://nodesecurity.io/advisories?search=minimatch&version=2.0.10 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> npm WARN notice [SECURITY] minimatch has the following vulnerability: 1 high. Go here for more details: https://nodesecurity.io/advisories?search=minimatch&version=2.0.10 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> npm WARN notice [SECURITY] lodash has the following vulnerability: 1 low. Go here for more details: https://nodesecurity.io/advisories?search=lodash&version=3.10.1 - Run `npm i npm@latest -g` to upgrade your npm version, and then `npm audit` to get more info.
> ```
> This is only for the build step (creating javascript) so I don't think it's a security issue for us.

May involve upgrading ember too