extension/tsconfig.json: target es2022

Regexp capturing group used in extesion/src/goTest/utils.ts `moduleNameRegex`
is available from es2018

Originally targetted to switch to es2018, but Ethan Reesor pointed out
the current vscode-go targets vscode 1.75.0+ and according to
https://github.com/ewanharris/vscode-versions, it must be able to
support node 16.14.2+. node.green shows 16.14.2 supports up through
es2022. From https://compat-table.github.io/compat-table/es2016plus/
es2022 is widely supported. So, bump up to es2022.

Fixes #3540

Change-Id: I033ef645f77b06ca1c9cf5415f3c7c95887be409
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/606695
Reviewed-by: Ethan Reesor <ethan.reesor@gmail.com>
Commit-Queue: Hyang-Ah Hana Kim <hyangah@gmail.com>
kokoro-CI: kokoro <noreply+kokoro@google.com>
Auto-Submit: Hyang-Ah Hana Kim <hyangah@gmail.com>
Reviewed-by: Hongxiang Jiang <hxjiang@golang.org>

Author: hyangah

extension/package-lock.json

@@ -92,7 +92,7 @@
   },
   "engines": {
     "vscode": "^1.75.0",
-    "node": ">=12.0.0"
+    "node": ">=16.14.2"
   },
   "activationEvents": [
     "onLanguage:go",

extension/package.json

@@ -3,9 +3,9 @@
 		"module": "commonjs",
 		"outDir": "out",
 		"sourceMap": true,
-		"target": "es2017",
+		"target": "es2022",
 		"lib": [
-			"es2017"
+			"es2022"
 		],
 		"strict": true,
 		"esModuleInterop": true,