* update deps
* update node version in CI file
* update node version in .babelrc
* update node version to 10
* update electron
* update karma-electron
* update element-ui etc
* update vega-embed etc
* update webpack-dev-server
* Fix tests and improve CI
* Add xvfb to Linux - still problems with Mocha e2e tests
* Disable Webpack Bundle Analyzer for testing
* Use preinstalled yarn application on AppVeyor
* Fix build failure with latest vue version
* Remove "markdown-toc"
* Fix application title unit test
* Hide electron window during unit tests
* Add basic muya unit tests
* Dirty markdown-toc replacement
* Update dependencies
* Update eslint packages and configuration