Add formatting libraries to composer.json

vendor/leafo/lessphp/tests/outputs/nested.css

@@ -0,0 +1,51 @@
+#header {
+  color: black;
+}
+#header .navigation {
+  font-size: 12px;
+}
+#header .navigation .border .outside {
+  color: blue;
+}
+#header .logo {
+  width: 300px;
+}
+#header .logo:hover {
+  text-decoration: none;
+}
+a b ul li {
+  color: green;
+}
+div .cool {
+  color: green;
+}
+p .cool span {
+  color: yellow;
+}
+div another {
+  color: green;
+}
+p another span {
+  color: yellow;
+}
+b .something {
+  color: blue;
+}
+b.something {
+  color: blue;
+}
+.foo .bar .qux,
+.foo .baz .qux {
+  display: block;
+}
+.qux .foo .bar,
+.qux .foo .baz {
+  display: inline;
+}
+.qux .foo .bar .biz,
+.qux .foo .baz .biz {
+  display: none;
+}
+b hello [x="&yeah"] {
+  color: red;
+}