Paket update added an app.config to every project

Using Paket v 2.2.1, when I ran an update it created an app.config in every single project. Would you mind taking a look please?

```
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<runtime><assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1" /></runtime></configuration>
```
