excluded vendored CSS from linting

Author: Felix Hennig

gulpfile.js

@@ -17,7 +17,7 @@ const serverConfig = { host: '0.0.0.0', port: 5252, livereload }
 const task = require('./gulp.d/tasks')
 const glob = {
   all: [srcDir, previewSrcDir],
-  css: `${srcDir}/css/**/*.css`,
+  css: [`${srcDir}/css/**/*.css`, `!${srcDir}/css/vendor/**/*.css`],
   js: ['gulpfile.js', 'gulp.d/**/*.js', `${srcDir}/{helpers,js}/**/*.js`],
 }
 

src/css/site.css

@@ -17,4 +17,4 @@
 @import "highlight.css";
 @import "print.css";
 @import "landing.css";
-@import "vendor/fontawesome.css";
+@import "vendor/fontawesome.css";