ionic generate: Unknown option: '--change-detection'

**Description:**

One of the examples in the [Ionic Generate docs](https://ionicframework.com/docs/cli/commands/generate#examples) is `ionic generate component login-form --change-detection=OnPush` but executing that exact command returns an error:

```
ionic generate component login-form --change-detection=OnPush
=> Unknown option: '--change-detection'
```

The same happens when trying to use some other options:

```
ionic generate component login-form --view-encapsulation=None
=> Unknown option: '--view-encapsulation'
```

**Steps to Reproduce:**

In any Ionic Angular project execute the following command: `ionic generate component login-form --change-detection=OnPush`

**Output:**

```
ionic generate component login-form --change-detection=OnPush
=> Unknown option: '--change-detection'
```

**My `ionic info`:**

```
Ionic:

Ionic CLI : 6.11.8
Ionic Framework : @ionic/angular 5.3.2
@angular-devkit/build-angular : 0.1000.8
@angular-devkit/schematics : 10.0.8
@angular/cli : 10.0.8
@ionic/angular-toolkit : 2.3.3

Cordova:

Cordova CLI : 9.0.0 (cordova-lib@9.0.1)
Cordova Platforms : android 9.0.0, ios 5.1.1
Cordova Plugins : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 5.0.0, (and 23 other plugins)

Utility:

cordova-res : 0.15.1
native-run (update available: 1.0.0) : 0.2.6

System:

Android SDK Tools : 26.1.1
ios-deploy : 1.9.4
ios-sim : 8.0.2
NodeJS : v10.16.2
npm : 6.9.0
OS : macOS Catalina
Xcode : Xcode 11.6 Build version 11E708
```