Deprecated npm packages

[BigNom]

Just ran npm install and there are several depreciated npm packages that need updating/replacing. circular-json@0.3.3 postinstall-build@5.0.3 url-search-params@1.1.0 joi@13.7.0 sw-precache@5.2.1 hoek@5.0.4 topo@3.0.3 sw-toolbox@3.6.0 core-js@1.2.7 browserslist@1.7.7 hoek@6.1.3 flatten@1.0.2

[calebmshafer]

Thanks @BigNom. I will let the team know and we will work on updating to the recommended new packages.