* Remove xmlstarlet from Travis CI "Lint" build
With https://github.com/birjolaxew/svglint/pull/6 merged some time ago,
we no longer need xmlstarlet to verify that SVGs are valid XML.
Essentially reverting the changes in #1112 and #1159
This should also make it easier for contributors to reproduce the build
on their own machines, specifically if they don't use Linux.
* Update dependencies
* Change "license" in package.json to SPDX format
Fixes the "npm WARN simple-icons@1.9.19 license should be a valid SPDX
license expression" warning given by NPM.
* Implement basic test for the NPM package
Just an initial test suite that checks if all promised imports actually
exist. The testing framework Jest was chosen because of it ease of setup
and use.
* Implement exhaustive tests of properties for each icon
* Added SVGLint
* Added SVGLint to CI
* Upgraded Node version used by CI
* Upgraded SVGLint to latest version
* Moved SVGLint configuration file
* Upgraded SVGLint
1.0.1 -> 1.0.2
Adds support for globs on Windows
* Added SVGLint check for aria-labelledby and title ID
