test: use ecmaVersion: "latest" in tests

Author: ota-meshi

packages/eslint-plugin-svelte/tests/src/integration/no-unused-vars.ts

@@ -8,7 +8,7 @@ describe('Integration test for no-unused-vars', () => {
 	const tester = new RuleTester({
 		languageOptions: {
 			parser: parser,
-			ecmaVersion: 2020,
+			ecmaVersion:"latest",
 			sourceType: 'module'
 		}
 	});

packages/eslint-plugin-svelte/tests/src/rules/@typescript-eslint/no-unnecessary-condition.ts

@@ -4,7 +4,7 @@ import { loadTestCases, RULES_PROJECT } from '../../../utils/utils.js';
 
 const tester = new RuleTester({
 	languageOptions: {
-		ecmaVersion: 2020,
+		ecmaVersion:"latest",
 		sourceType: 'module',
 		parserOptions: {
 			parser: {

packages/eslint-plugin-svelte/tests/src/rules/block-lang.ts

@@ -4,7 +4,7 @@ import { loadTestCases } from '../../utils/utils.js';
 
 const tester = new RuleTester({
 	languageOptions: {
-		ecmaVersion: 2020,
+		ecmaVersion:"latest",
 		sourceType: 'module'
 	}
 });

packages/eslint-plugin-svelte/tests/src/rules/button-has-type.ts

@@ -4,7 +4,7 @@ import { loadTestCases } from '../../utils/utils.js';
 
 const tester = new RuleTester({
 	languageOptions: {
-		ecmaVersion: 2020,
+		ecmaVersion:"latest",
 		sourceType: 'module'
 	}
 });

packages/eslint-plugin-svelte/tests/src/rules/comment-directive.ts

@@ -17,7 +17,7 @@ describe('comment-directive', () => {
 			baseConfig: {
 				languageOptions: {
 					parser: svelteParser,
-					ecmaVersion: 2020
+					ecmaVersion:"latest"
 				},
 				plugins: {
 					svelte: plugin
@@ -360,7 +360,7 @@ describe('comment-directive', () => {
 				baseConfig: {
 					languageOptions: {
 						parser: svelteParser,
-						ecmaVersion: 2020
+						ecmaVersion:"latest"
 					},
 					plugins: {
 						svelte: plugin

packages/eslint-plugin-svelte/tests/src/rules/consistent-selector-style.ts

@@ -4,7 +4,7 @@ import { loadTestCases } from '../../utils/utils';
 
 const tester = new RuleTester({
 	languageOptions: {
-		ecmaVersion: 2020,
+		ecmaVersion:"latest",
 		sourceType: 'module'
 	}
 });

packages/eslint-plugin-svelte/tests/src/rules/derived-has-same-inputs-outputs.ts

@@ -4,7 +4,7 @@ import { loadTestCases } from '../../utils/utils.js';
 
 const tester = new RuleTester({
 	languageOptions: {
-		ecmaVersion: 2020,
+		ecmaVersion:"latest",
 		sourceType: 'module'
 	}
 });

packages/eslint-plugin-svelte/tests/src/rules/experimental-require-slot-types.ts

@@ -4,7 +4,7 @@ import { loadTestCases } from '../../utils/utils.js';
 
 const tester = new RuleTester({
 	languageOptions: {
-		ecmaVersion: 2020,
+		ecmaVersion:"latest",
 		sourceType: 'module'
 	}
 });

packages/eslint-plugin-svelte/tests/src/rules/experimental-require-strict-events.ts

@@ -4,7 +4,7 @@ import { loadTestCases } from '../../utils/utils.js';
 
 const tester = new RuleTester({
 	languageOptions: {
-		ecmaVersion: 2020,
+		ecmaVersion:"latest",
 		sourceType: 'module'
 	}
 });

packages/eslint-plugin-svelte/tests/src/rules/first-attribute-linebreak.ts

@@ -4,7 +4,7 @@ import { loadTestCases } from '../../utils/utils.js';
 
 const tester = new RuleTester({
 	languageOptions: {
-		ecmaVersion: 2020,
+		ecmaVersion:"latest",
 		sourceType: 'module'
 	}
 });