Update @typescript-eslint/parser to v5 (#1555)

Author: fisker

package.json

@@ -59,7 +59,7 @@
 		"@babel/core": "^7.15.5",
 		"@babel/eslint-parser": "^7.15.8",
 		"@lubien/fixture-beta-package": "^1.0.0-beta.1",
-		"@typescript-eslint/parser": "^4.32.0",
+		"@typescript-eslint/parser": "^5.2.0",
 		"ava": "^3.15.0",
 		"chalk": "^4.1.2",
 		"enquirer": "2.3.6",

rules/no-static-only-class.js

@@ -44,7 +44,7 @@ function isStaticMember(node) {
 		return false;
 	}
 
-	if (!isStatic || isPrivate) {
+	if (!isStatic || isPrivate || key.type === 'PrivateIdentifier') {
 		return false;
 	}
 
@@ -54,6 +54,7 @@ function isStaticMember(node) {
 		|| isReadonly
 		|| typeof accessibility !== 'undefined'
 		|| (Array.isArray(decorators) && decorators.length > 0)
+		// TODO: Remove this when we drop support for `@typescript-eslint/parser` v4
 		|| key.type === 'TSPrivateIdentifier'
 	) {
 		return false;

test/no-static-only-class.mjs

@@ -16,6 +16,11 @@ test.snapshot({
 		'class A { constructor() {} }',
 		'class A { get a() {} }',
 		'class A { set a(value) {} }',
+		// `private`
+		'class A3 { static #a() {}; }',
+		'class A3 { static #a = 1; }',
+		'const A3 = class { static #a() {}; }',
+		'const A3 = class { static #a = 1; }',
 		// TODO: enable this test when ESLint support `StaticBlock`
 		// Static block
 		// 'class A2 { static {}; }',
@@ -216,6 +221,11 @@ test.babel({
 		},
 	},
 	valid: [
+		// `private`
+		'class A2 { static #a() {}; }',
+		'class A2 { static #a = 1; }',
+		'const A2 = class { static #a() {}; }',
+		'const A2 = class { static #a = 1; }',
 		// Static block
 		'class A2 { static {}; }',
 	],