TL;DR
If you DON'T want node-gyp to depend on your installed version of Visual Studio (or don't have VS installed), install windows-build-tools (see below). This will eliminate both the error and should avoid future issues when upgrading your installed version of Visual Studio.
If you DO want node-gyp to depend on your installed version of Visual Studio, then npm config set msvs_version 2015, substitute your version tag in place of 2015. Valid versions tags are: 2015,2014,2013,110,100
Fixing using windows-build-tools
Per the node-gyp installation instructions, you can also do
npm install --global --production windows-build-tools from an ELEVATED command shell
This will install the strictly the Microsoft Visual C++ Build Tools (this will be used in place of Visual Studio for compilation) required by node-gyp, and appropriately set msvs_version to the version just installed.
After installing, you should check that the msvs_version set by windows-build-tools has not been overridden. When executing npm config list, msvs_version should appear under ; globalconfig C:\Users\Username\AppData\Roaming\npm\etc\npmrc; if it does not, the value set by windows-build-tools has been overridden and the overridden value should be deleted. npm config delete msvs_version should delete the overridden value and the one set by the build tools should appear under the global config section.