build: Add and use 'browserslist-config-wikimedia'

Use central, shareable `browserslist-config-wikimedia/modern` config.

Bug: T282937
Change-Id: I72b38cba2028eab0b67543d066c341b76b91b5bb

.browserslistrc

@@ -1,17 +1,7 @@
-# See Grade A in resource loader startup module mediawikicore resources/src/startup/startup.js
+# Browserslist configuration of browsers with basic level of support.
+# Please see https://www.mediawiki.org/wiki/Compatibility#Mobile and
+# https://github.com/wikimedia/browserslist-config-wikimedia/
+# See also browsers definition in ResourceLoader startup module
+# in MediaWiki core 'resources/src/startup/startup.js'.
 
-# https//en.wikipedia.org/wiki/Google_Chrome_version_history
-chrome 13
-
-ie 11
-
-# https//en.wikipedia.org/wiki/Firefox_version_history
-firefox 4.0
-
-safari 5.0
-
-opera 15
-
-ios 6.0
-
-android 4.1
+extends browserslist-config-wikimedia/modern

package-lock.json

@@ -5162,6 +5162,12 @@
 				"node-releases": "^1.1.71"
 			}
 		},
+		"browserslist-config-wikimedia": {
+			"version": "0.2.0",
+			"resolved": "https://registry.npmjs.org/browserslist-config-wikimedia/-/browserslist-config-wikimedia-0.2.0.tgz",
+			"integrity": "sha512-vIF9Nk1eAgvTAmY3mXUQ67rHIMFla4DsM5ohOt7AgUw/2YsNNnNFdRdDW7CI46FWdjexbeM9uW30Y/vwQTts6Q==",
+			"dev": true
+		},
 		"bser": {
 			"version": "2.1.1",
 			"resolved": "https://registry.npmjs.org/bser/-/bser-2.1.1.tgz",

package.json

@@ -42,6 +42,7 @@
 		"@wdio/sync": "6.3.3",
 		"@wikimedia/mw-node-qunit": "6.1.0",
 		"babel-loader": "8.0.4",
+		"browserslist-config-wikimedia": "0.2.0",
 		"bundlesize": "0.18.0",
 		"clean-webpack-plugin": "3.0.0",
 		"cssjanus": "1.3.1",