build: Update linters

eslint-config-wikimedia      0.8.1  →   0.9.0
 stylelint-config-wikimedia   0.4.3  →   0.5.0

Change-Id: I0f55e743c2f38bb8910931c3989a6516e0527703

resources/css/ext.uls.languagesettings.less

@@ -34,13 +34,11 @@
 		width: 100%;
 		/* Using border instead of outline for focus (outline doesn't have enough space) */
 		outline: 0;
-
 		color: #222;
 		padding: 5px 0 5px 42px;
 		border: 1px solid transparent;
 		background: left 15px top 6px transparent no-repeat;
 		background-size: 20px auto;
-
 		cursor: pointer;
 
 		// Remove the dotted border for Firefox

resources/css/ext.uls.less

@@ -60,6 +60,7 @@
 	.uls-no-found-more {
 		background-color: #fff;
 	}
+
 	h3 {
 		padding: 0 28px;
 		margin: 0;

resources/css/ext.uls.mixins.less

@@ -11,6 +11,7 @@
 		position: absolute;
 		content: '';
 	}
+
 	&.selector-right {
 		&:before {
 			/* @noflip */
@@ -18,6 +19,7 @@
 			/* @noflip */
 			right: -11px;
 		}
+
 		&:after {
 			/* @noflip */
 			border-left: 10px solid #fff;
@@ -25,6 +27,7 @@
 			right: -10px;
 		}
 	}
+
 	&.selector-left {
 		&:before {
 			/* @noflip */
@@ -32,6 +35,7 @@
 			/* @noflip */
 			left: -11px;
 		}
+
 		&:after {
 			/* @noflip */
 			border-right: 10px solid #fff;