diff --git a/composer.json b/composer.json
index a271b68d..151b48b0 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
 	"require-dev": {
 		"jakub-onderka/php-parallel-lint": "1.0.0",
-		"mediawiki/mediawiki-codesniffer": "29.0.0",
+		"mediawiki/mediawiki-codesniffer": "30.0.0",
 		"jakub-onderka/php-console-highlighter": "0.4.0",
 		"mediawiki/minus-x": "1.0.0",
 		"mediawiki/mediawiki-phan-config": "0.9.1"
diff --git a/package-lock.json b/package-lock.json
index 3bab8b7d..45ce9ea6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -397,37 +397,78 @@
 			}
 		},
 		"eslint-config-wikimedia": {
-			"version": "0.15.0",
-			"resolved": "https://registry.npmjs.org/eslint-config-wikimedia/-/eslint-config-wikimedia-0.15.0.tgz",
-			"integrity": "sha512-aW3ETh3MSZCNrEeehZZfLBGhaH1t928/YkQ9p7a4aB1ZX1G8uuw8jj7izkr0iJj3da42ZPZbnsjT3G5nmAwinw==",
+			"version": "0.15.3",
+			"resolved": "https://registry.npmjs.org/eslint-config-wikimedia/-/eslint-config-wikimedia-0.15.3.tgz",
+			"integrity": "sha512-MGfUwNoW2IckRismX3L8a/CI1CKkYyXHiIyAqiu27TCQwrDubryI+rtuuFYozauB3LC5WSIOnW2m1ZljtPvPPg==",
 			"dev": true,
 			"requires": {
-				"eslint": "^6.5.1",
-				"eslint-plugin-json": "^1.4.0",
-				"eslint-plugin-mediawiki": "^0.1.0",
-				"eslint-plugin-no-jquery": "^2.3.0",
-				"eslint-plugin-qunit": "^4.0.0"
+				"eslint": "^6.8.0",
+				"eslint-plugin-es": "^3.0.0",
+				"eslint-plugin-json": "^2.1.1",
+				"eslint-plugin-mediawiki": "^0.2.3",
+				"eslint-plugin-no-jquery": "^2.3.2",
+				"eslint-plugin-qunit": "^4.0.0",
+				"eslint-plugin-vue": "^6.1.2"
+			}
+		},
+		"eslint-plugin-es": {
+			"version": "3.0.0",
+			"resolved": "https://registry.npmjs.org/eslint-plugin-es/-/eslint-plugin-es-3.0.0.tgz",
+			"integrity": "sha512-6/Jb/J/ZvSebydwbBJO1R9E5ky7YeElfK56Veh7e4QGFHCXoIXGH9HhVz+ibJLM3XJ1XjP+T7rKBLUa/Y7eIng==",
+			"dev": true,
+			"requires": {
+				"eslint-utils": "^2.0.0",
+				"regexpp": "^3.0.0"
+			},
+			"dependencies": {
+				"eslint-utils": {
+					"version": "2.0.0",
+					"resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-2.0.0.tgz",
+					"integrity": "sha512-0HCPuJv+7Wv1bACm8y5/ECVfYdfsAm9xmVb7saeFlxjPYALefjhbYoCkBjPdPzGH8wWyTpAez82Fh3VKYEZ8OA==",
+					"dev": true,
+					"requires": {
+						"eslint-visitor-keys": "^1.1.0"
+					}
+				},
+				"regexpp": {
+					"version": "3.1.0",
+					"resolved": "https://registry.npmjs.org/regexpp/-/regexpp-3.1.0.tgz",
+					"integrity": "sha512-ZOIzd8yVsQQA7j8GCSlPGXwg5PfmA1mrq0JP4nGhh54LaKN3xdai/vHUDu74pKwV8OxseMS65u2NImosQcSD0Q==",
+					"dev": true
+				}
 			}
 		},
 		"eslint-plugin-json": {
-			"version": "1.4.0",
-			"resolved": "https://registry.npmjs.org/eslint-plugin-json/-/eslint-plugin-json-1.4.0.tgz",
-			"integrity": "sha512-CECvgRAWtUzuepdlPWd+VA7fhyF9HT183pZnl8wQw5x699Mk/MbME/q8xtULBfooi3LUbj6fToieNmsvUcDxWA==",
+			"version": "2.1.1",
+			"resolved": "https://registry.npmjs.org/eslint-plugin-json/-/eslint-plugin-json-2.1.1.tgz",
+			"integrity": "sha512-Ktsab8ij33V2KFLhh4alC1FYztdmbV32DeMZYYUCZm4kKLW1s4DrleKKgtbAHSJsmshCK5QGOZtfyc2r3jCRsg==",
 			"dev": true,
 			"requires": {
-				"vscode-json-languageservice": "^3.2.1"
+				"lodash": "^4.17.15",
+				"vscode-json-languageservice": "^3.5.1"
+			},
+			"dependencies": {
+				"lodash": {
+					"version": "4.17.15",
+					"resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
+					"integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==",
+					"dev": true
+				}
 			}
 		},
 		"eslint-plugin-mediawiki": {
-			"version": "0.1.0",
-			"resolved": "https://registry.npmjs.org/eslint-plugin-mediawiki/-/eslint-plugin-mediawiki-0.1.0.tgz",
-			"integrity": "sha512-OiRH4axfR+TOFbw/7fKHakgleo0z9nXAiLzN7Bo1iqQNK9QTTK0v1MqQUfJXy4SfDQih7g1yHUDl80Ea1oinmQ==",
-			"dev": true
+			"version": "0.2.3",
+			"resolved": "https://registry.npmjs.org/eslint-plugin-mediawiki/-/eslint-plugin-mediawiki-0.2.3.tgz",
+			"integrity": "sha512-/6CB/VdwZHIsPZ5gZJ3amwHUbEgbL6DZULXWTRwKoS+2q5t8TS1hu+EX83a1hPrxGWFusfV+bvgOi15aXVXi4Q==",
+			"dev": true,
+			"requires": {
+				"eslint-plugin-vue": "^6.2.2"
+			}
 		},
 		"eslint-plugin-no-jquery": {
-			"version": "2.3.0",
-			"resolved": "https://registry.npmjs.org/eslint-plugin-no-jquery/-/eslint-plugin-no-jquery-2.3.0.tgz",
-			"integrity": "sha512-XQQZM5yKO72Y8QAojNhH8oYLnLZU34FovNHVoJlPLBuBPJk0kkiPNOS/K6wRFbVgn47iZHsT6E+7mSLwbcQEsg==",
+			"version": "2.3.2",
+			"resolved": "https://registry.npmjs.org/eslint-plugin-no-jquery/-/eslint-plugin-no-jquery-2.3.2.tgz",
+			"integrity": "sha512-8M9GByb/JOO+dktgbFeC/YAMaqlscInO3fH3A9fLxZduH1NTXsIAUrimas6zDwOLBvEXpRaEZycc2QAl+W+Agw==",
 			"dev": true
 		},
 		"eslint-plugin-qunit": {
@@ -436,6 +477,17 @@
 			"integrity": "sha512-+0i2xcYryUoLawi47Lp0iJKzkP931G5GXwIOq1KBKQc2pknV1VPjfE6b4mI2mR2RnL7WRoS30YjwC9SjQgJDXQ==",
 			"dev": true
 		},
+		"eslint-plugin-vue": {
+			"version": "6.2.2",
+			"resolved": "https://registry.npmjs.org/eslint-plugin-vue/-/eslint-plugin-vue-6.2.2.tgz",
+			"integrity": "sha512-Nhc+oVAHm0uz/PkJAWscwIT4ijTrK5fqNqz9QB1D35SbbuMG1uB6Yr5AJpvPSWg+WOw7nYNswerYh0kOk64gqQ==",
+			"dev": true,
+			"requires": {
+				"natural-compare": "^1.4.0",
+				"semver": "^5.6.0",
+				"vue-eslint-parser": "^7.0.0"
+			}
+		},
 		"eslint-scope": {
 			"version": "5.0.0",
 			"resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-5.0.0.tgz",
@@ -1110,9 +1162,9 @@
 			"dev": true
 		},
 		"jsonc-parser": {
-			"version": "2.2.0",
-			"resolved": "https://registry.npmjs.org/jsonc-parser/-/jsonc-parser-2.2.0.tgz",
-			"integrity": "sha512-4fLQxW1j/5fWj6p78vAlAafoCKtuBm6ghv+Ij5W2DrDx0qE+ZdEl2c6Ko1mgJNF5ftX1iEWQQ4Ap7+3GlhjkOA==",
+			"version": "2.2.1",
+			"resolved": "https://registry.npmjs.org/jsonc-parser/-/jsonc-parser-2.2.1.tgz",
+			"integrity": "sha512-o6/yDBYccGvTz1+QFevz6l6OBZ2+fMVu2JZ9CIhzsYRX4mjaK5IyX9eldUdCmga16zlgQxyrj5pt9kzuj2C02w==",
 			"dev": true
 		},
 		"levn": {
@@ -1852,34 +1904,34 @@
 			}
 		},
 		"vscode-json-languageservice": {
-			"version": "3.4.9",
-			"resolved": "https://registry.npmjs.org/vscode-json-languageservice/-/vscode-json-languageservice-3.4.9.tgz",
-			"integrity": "sha512-4VCpZ9ooea/Zc/MTnj1ccc9C7rqcoinKVQLhLoi6jw6yueSf4y4tg/YIUiPPVMlEAG7ZCPS+NVmqxisQ+mOsSw==",
+			"version": "3.5.2",
+			"resolved": "https://registry.npmjs.org/vscode-json-languageservice/-/vscode-json-languageservice-3.5.2.tgz",
+			"integrity": "sha512-9cUvBq00O08lpWVVOx6tQ1yLxCHss79nsUdEAVYGomRyMbnPBmc0AkYPcXI9WK1EM6HBo0R9Zo3NjFhcICpy4A==",
 			"dev": true,
 			"requires": {
-				"jsonc-parser": "^2.2.0",
-				"vscode-languageserver-textdocument": "^1.0.0-next.4",
-				"vscode-languageserver-types": "^3.15.0-next.6",
+				"jsonc-parser": "^2.2.1",
+				"vscode-languageserver-textdocument": "^1.0.1",
+				"vscode-languageserver-types": "^3.15.1",
 				"vscode-nls": "^4.1.1",
-				"vscode-uri": "^2.1.0"
+				"vscode-uri": "^2.1.1"
 			}
 		},
 		"vscode-languageserver-textdocument": {
-			"version": "1.0.0-next.5",
-			"resolved": "https://registry.npmjs.org/vscode-languageserver-textdocument/-/vscode-languageserver-textdocument-1.0.0-next.5.tgz",
-			"integrity": "sha512-1jp/zAidN/bF/sqPimhBX1orH5G4rzRw63k75TesukJDuxm8yW79ECStWbDSy41BHGOwSGN4M69QFvhancSr5A==",
+			"version": "1.0.1",
+			"resolved": "https://registry.npmjs.org/vscode-languageserver-textdocument/-/vscode-languageserver-textdocument-1.0.1.tgz",
+			"integrity": "sha512-UIcJDjX7IFkck7cSkNNyzIz5FyvpQfY7sdzVy+wkKN/BLaD4DQ0ppXQrKePomCxTS7RrolK1I0pey0bG9eh8dA==",
 			"dev": true
 		},
 		"vscode-languageserver-types": {
-			"version": "3.15.0-next.9",
-			"resolved": "https://registry.npmjs.org/vscode-languageserver-types/-/vscode-languageserver-types-3.15.0-next.9.tgz",
-			"integrity": "sha512-Rl/8qJ6932nrHCdPn+9y0x08uLVQaSLRG+U4JzhyKpWU4eJbVaDRoAcz1Llj7CErJGbPr6kdBvShPy5fRfR+Uw==",
+			"version": "3.15.1",
+			"resolved": "https://registry.npmjs.org/vscode-languageserver-types/-/vscode-languageserver-types-3.15.1.tgz",
+			"integrity": "sha512-+a9MPUQrNGRrGU630OGbYVQ+11iOIovjCkqxajPa9w57Sd5ruK8WQNsslzpa0x/QJqC8kRc2DUxWjIFwoNm4ZQ==",
 			"dev": true
 		},
 		"vscode-nls": {
-			"version": "4.1.1",
-			"resolved": "https://registry.npmjs.org/vscode-nls/-/vscode-nls-4.1.1.tgz",
-			"integrity": "sha512-4R+2UoUUU/LdnMnFjePxfLqNhBS8lrAFyX7pjb2ud/lqDkrUavFUTcG7wR0HBZFakae0Q6KLBFjMS6W93F403A==",
+			"version": "4.1.2",
+			"resolved": "https://registry.npmjs.org/vscode-nls/-/vscode-nls-4.1.2.tgz",
+			"integrity": "sha512-7bOHxPsfyuCqmP+hZXscLhiHwe7CSuFE4hyhbs22xPIhQ4jv99FcR4eBzfYYVLP356HNFpdvz63FFb/xw6T4Iw==",
 			"dev": true
 		},
 		"vscode-uri": {
@@ -1888,6 +1940,28 @@
 			"integrity": "sha512-eY9jmGoEnVf8VE8xr5znSah7Qt1P/xsCdErz+g8HYZtJ7bZqKH5E3d+6oVNm1AC/c6IHUDokbmVXKOi4qPAC9A==",
 			"dev": true
 		},
+		"vue-eslint-parser": {
+			"version": "7.0.0",
+			"resolved": "https://registry.npmjs.org/vue-eslint-parser/-/vue-eslint-parser-7.0.0.tgz",
+			"integrity": "sha512-yR0dLxsTT7JfD2YQo9BhnQ6bUTLsZouuzt9SKRP7XNaZJV459gvlsJo4vT2nhZ/2dH9j3c53bIx9dnqU2prM9g==",
+			"dev": true,
+			"requires": {
+				"debug": "^4.1.1",
+				"eslint-scope": "^5.0.0",
+				"eslint-visitor-keys": "^1.1.0",
+				"espree": "^6.1.2",
+				"esquery": "^1.0.1",
+				"lodash": "^4.17.15"
+			},
+			"dependencies": {
+				"lodash": {
+					"version": "4.17.15",
+					"resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
+					"integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==",
+					"dev": true
+				}
+			}
+		},
 		"websocket-driver": {
 			"version": "0.7.0",
 			"resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.7.0.tgz",
diff --git a/package.json b/package.json
index d69b0793..31032556 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
 		"test": "grunt test"
 	},
 	"devDependencies": {
-		"eslint-config-wikimedia": "0.15.0",
+		"eslint-config-wikimedia": "0.15.3",
 		"grunt": "1.1.0",
 		"grunt-banana-checker": "0.9.0",
 		"grunt-contrib-watch": "1.1.0",