Update start-installation.md
Update start-installation.md

According to the release note https://github.com/francoispluchino/composer-asset-plugin/releases/tag/v1.1.1 doesn't force composer to throw deprecation messages:
```
Deprecation Notice: The Composer\Package\LinkConstraint\MultiConstraint class is deprecated, use Composer\Semver\Constraint\MultiConstraint instead. in phar:///usr/local/bin/composer/src/Composer/Package/LinkConstraint/MultiConstraint.php:17
Deprecation Notice: The Composer\Package\LinkConstraint\LinkConstraintInterface interface is deprecated, use Composer\Semver\Constraint\ConstraintInterface instead. in phar:///usr/local/bin/composer/src/Composer/Package/LinkConstraint/LinkConstraintInterface.php:17
```
githubjeka/yii2-app-advanced,subdee/myportugal,cophiel/YII2-Learning,yiisoft/yii2-app-advanced,vitezmiklos/test,jgege/MonApp,OneServices/OneCMS,tibrus/yii2-app-advanced,dmitry-kulikov/yii2-app-advanced,AnTAVR/yii2-app-advanced-ru,dixonsatit/yii2-dixon-starter,dixonsatit/yii2-dixon-starter,erycamel/yii2-app-advanced,yiisoft/yii2-app-advanced,jacmoe/yii2-app-advanced-zurbified,mobilejazz/yii2-mj-cms-example,yiijan/yii2-app-advanced,AnTAVR/yii2-app-advanced-ru,hiqsol/yii2-app-advanced,Somefive/Athena,urmaul/yii2-app-advanced-mongodb,cophiel/YII2-Learning,dmitry-kulikov/yii2-app-advanced,fredyns/yii2-boilerplate,nikbas/yii2-app-advanced,yiijan/yii2-app-advanced,erycamel/yii2-app-advanced,nikbas/yii2-app-advanced,Somefive/Athena,fredyns/yii2-boilerplate,jgege/MonApp,subdee/myportugal,mobilejazz/yii2-mj-cms-example,AnTAVR/yii2-app-advanced-ru,jacmoe/yii2-app-advanced-zurbified,fredyns/yii2-boilerplate,githubjeka/yii2-app-advanced