Update minimal TypeScript version to 3.7.2 or higher (webdriverio#4740)

* update typescript to v3.7.3 * fix types * add circular reference for jsonArray

Author: christian-bromann

docs/TypeScript.md

@@ -5,7 +5,7 @@ title: TypeScript Setup
 
 Similar to Babel setup, you can register [TypeScript](http://www.typescriptlang.org) to compile your `*.ts` files in the `before` hook of your config file. You will need [`ts-node`](https://github.com/TypeStrong/ts-node) and [`tsconfig-paths`](https://github.com/dividab/tsconfig-paths) installed as `devDependencies`.
 
-The minimum TypeScript version is 3.5.1.
+The minimum TypeScript version is 3.7.3.
 
 ```js
 // wdio.conf.js

packages/devtools/package.json

@@ -10,7 +10,7 @@
  "node": ">=10.0.0"
  },
  "types": "./devtools.d.ts",
- "typeScriptVersion": "3.5.1",
+ "typeScriptVersion": "3.7.3",
  "scripts": {
  "build": "run-s clean compile",
  "clean": "rimraf ./build",

packages/wdio-shared-store-service/shared-store-service.d.ts

@@ -1,16 +1,8 @@
 type jsonPrimitive = string | number | boolean | null;
 type jsonObject = { [x: string]: jsonPrimitive | jsonObject | jsonArray };
-type jsonArray = Array<jsonPrimitive | jsonObject | jsonArrayWorkaround>;
+type jsonArray = Array<jsonPrimitive | jsonObject | jsonArray>;
 type jsonCompatible = jsonPrimitive | jsonObject | jsonArray;
 
-/**
- * circular reference workaround until TypeScript 3.7
- * https://github.com/microsoft/TypeScript/pull/33050
- * `jsonArray` should repplace `jsonArrayWorkaround` in `jsonArray` array types
- * and interface below can be removed
- */
-interface jsonArrayWorkaround extends Array<jsonPrimitive | jsonObject | jsonArray> { }
-
 declare namespace WebdriverIO {
  interface BrowserObject {
  sharedStore: {

packages/wdio-sync/package.json

@@ -18,7 +18,7 @@
  "test:unit": "jest"
  },
  "types": "./webdriverio.d.ts",
- "typeScriptVersion": "3.5.1",
+ "typeScriptVersion": "3.7.3",
  "repository": {
  "type": "git",
  "url": "git://github.com/webdriverio/webdriverio.git"

packages/webdriver/package.json

@@ -10,7 +10,7 @@
  "node": ">=10.0.0"
  },
  "types": "./webdriver.d.ts",
- "typeScriptVersion": "3.5.1",
+ "typeScriptVersion": "3.7.3",
  "scripts": {
  "build": "run-s clean compile",
  "clean": "rimraf ./build",

packages/webdriverio/package.json

@@ -46,7 +46,7 @@
  "testingbot"
  ],
  "types": "./webdriverio.d.ts",
- "typeScriptVersion": "3.5.1",
+ "typeScriptVersion": "3.7.3",
  "scripts": {
  "build": "run-s clean compile",
  "clean": "rimraf ./build",