Add tsconfig.json file for scripts directory

This will fix linting errors when `lint-staged` is run and there are
changed files in the `scripts` directory.

extensions/ql-vscode/.eslintrc.js

@@ -3,7 +3,7 @@ module.exports = {
   parserOptions: {
     ecmaVersion: 2018,
     sourceType: "module",
-    project: ["tsconfig.json", "./src/**/tsconfig.json", "./gulpfile.ts/tsconfig.json"],
+    project: ["tsconfig.json", "./src/**/tsconfig.json", "./gulpfile.ts/tsconfig.json", "./scripts/tsconfig.json"],
   },
   plugins: ["@typescript-eslint"],
   env: {

extensions/ql-vscode/scripts/fix-scenario-file-numbering.ts

@@ -14,7 +14,7 @@ import * as fs from 'fs-extra';
 import * as path from 'path';
 
 if (process.argv.length !== 3) {
-  console.error('Expected 1 argument - the scenario name')
+  console.error('Expected 1 argument - the scenario name');
 }
 
 const scenarioName = process.argv[2];
@@ -39,7 +39,7 @@ async function fixScenarioFiles() {
   });
 
   let index = 0;
-  for (let file of orderedFiles) {
+  for (const file of orderedFiles) {
     const ext = path.extname(file);
     if (ext === '.json') {
       const fileName = path.basename(file, ext);

extensions/ql-vscode/scripts/tsconfig.json

@@ -0,0 +1,6 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "extends": "../tsconfig.json",
+  "include": ["**/*.ts"],
+  "exclude": []
+}