chore!: update tsc target to ES2020

Minimal supported vscode version is 1.67 and it support ES2020.

Earlier I used ES2015 just because it worked with 1.30 vscode, but
result JS is too "obfuscated", so it makes debugging harder.
Also, this version can have some features (syntax/api/etc...) which will
make code cleaner.

Author: ashenBlade

src/test/suite/formatting.test.ts

@@ -3,7 +3,7 @@ import * as vscode from 'vscode';
 import { getTestEnv, TestEnv } from './env';
 import * as utils from '../../utils';
 import * as fs from 'fs';
-import path from 'path';
+import * as path from 'path';
 
 function getFormattedFile(env: TestEnv) {
     const path = env.getExtensionPath('src', 'test', 'patches', 'formatted.c');

src/test/suite/index.ts

@@ -1,5 +1,5 @@
 import * as path from 'path';
-import Mocha from 'mocha';
+import * as Mocha from 'mocha';
 import { glob } from 'glob';
 import { getTestEnv } from './env';
 
@@ -32,7 +32,7 @@ export function run(): Promise<void> {
             })
 
             /* Run tests */
-            mocha.run(failures => {
+            mocha.run((failures: number) => {
                 if (0 < failures) {
                     e(new Error(`${failures} tests failed.`));
                 } else {

src/utils.ts

@@ -1,5 +1,5 @@
 import * as vscode from 'vscode';
-import path from 'path';
+import * as path from 'path';
 import * as util from 'util';
 import * as child_process from 'child_process';
 import { Configuration } from './extension';

tsconfig.json

@@ -1,10 +1,10 @@
 {
 	"compilerOptions": {
-		"module": "Node16",
-		"target": "ES2015",
+		"module": "commonjs",
+		"target": "ES2020",
 		"outDir": "out",
 		"lib": [
-			"ES2015"
+			"ES2020"
 		],
 		"sourceMap": true,
 		"rootDir": "src",
@@ -13,5 +13,9 @@
 		// "noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
 		// "noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */
 		// "noUnusedParameters": true,  /* Report errors on unused parameters. */
-	}
+	},
+	"exclude": [
+		"node_modules",
+		".vscode-test"
+	]
 }