Error at first on `ionic serve`, then working app on re-save of file

When I first run `ionic serve` I get a page with some Typescript errors:

```
Error

Typescript Error
Property 'padStart' does not exist on type 'string'.
...

Typescript Error
Property 'values' does not exist on type 'ObjectConstructor'.
...

Typescript Error
Property 'values' does not exist on type 'ObjectConstructor'.
...

Typescript Error
Property 'values' does not exist on type 'ObjectConstructor'.
...

Typescript Error
Property 'xAxes' does not exist on type '{ yAxes: { ticks: { beginAtZero: boolean; }; }[]; }'.
...
```

This is all true, but when I just resave any file of my project this all doesn't matter any more as the project is reloaded and just works.

My `ionic info`:

```
λ ionic info
√ Gathering environment info - done!

Ionic:

ionic (Ionic CLI) : 4.1.2 (C:\nvm\v10.7.0\node_modules\ionic)
Ionic Framework : ionic-angular 3.5.3
@ionic/app-scripts : 3.2.0

Cordova:

cordova (Cordova CLI) : 8.0.0
Cordova Platforms : android 7.1.1, ios 4.5.5
Cordova Plugins : no whitelisted plugins (8 plugins total)

System:

Android SDK Tools : 26.1.1 (C:\Android)
NodeJS : v10.7.0 (C:\Program Files\nodejs\node.exe)
npm : 6.1.0
OS : Windows 10
```

使用回報的 Ionic CLI、Ionic Framework、app-scripts、Node.js 和 Windows 版本，透過 `ionic serve` 重現首次執行時的行為。比較初始的 TypeScript 診斷結果與儲存檔案後的結果；當初始 serve 不再顯示回報的錯誤，且不需要執行儲存操作時，即表示完成。

由索引模型根據 Issue 內容生成。