Update to Webpack 4

Author: philwareham

dist/textpattern/jquery-ui.css

@@ -2892,3 +2892,4 @@ input[type="button"] .ui-icon,
 .ui-extra-icon-github {
   background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%23333' d='M7.999 1a7 7 0 0 0-2.212 13.642c.35.064.478-.152.478-.337 0-.166-.006-.606-.009-1.191-1.947.423-2.358-.938-2.358-.938-.318-.809-.777-1.024-.777-1.024-.636-.434.048-.426.048-.426.702.05 1.072.721 1.072.721.624 1.07 1.638.761 2.037.582.064-.452.245-.761.444-.936-1.554-.177-3.188-.777-3.188-3.46 0-.764.273-1.389.72-1.878-.072-.176-.312-.888.069-1.852 0 0 .588-.188 1.925.718A6.683 6.683 0 0 1 8 4.385c.594.003 1.193.08 1.752.236 1.336-.906 1.923-.718 1.923-.718.382.964.142 1.675.07 1.853.449.489.72 1.114.72 1.878 0 2.689-1.637 3.281-3.196 3.454.251.216.475.643.475 1.296 0 .936-.009 1.691-.009 1.92 0 .187.126.405.481.337A7.001 7.001 0 0 0 7.999 1z'/%3E%3C/svg%3E");
 }
+