Hugo 0.78.1: A couple of Bug Fixes

The main fix in this release is that of dependency resolution for package.json/node_modules in theme components. See the documentation for more information.

• Disable NPM test on Travis on Windows 3437174c @bep
• travis: Install nodejs on Windows f66302ca @bep
• js: Remove external source map option 944150ba @bep #7932
• js: Misc fixes bf2837a3 @bep #7924#7923