Compatibility with Cake.Core 1.0.0

When Cake.TeamCityCoverageReporter is used with Cake 1.0.0+ I see a warning in the build log

## Expected Behavior
I expect no warning message

## Current Behavior
When running I see:
```
The assembly 'Cake.TeamCityCoverageReporter, Version=0.2.2.0, Culture=neutral, PublicKeyToken=null'
is referencing an older version of Cake.Core (0.33.0).
For best compatibility it should target Cake.Core version 1.0.0.
```

Start by locating the project configuration and the Cake.Core dependency used by Cake.TeamCityCoverageReporter. Check how the current Cake.Core 0.33.0 reference is specified, update the compatibility target to Cake 1.0.0, and run the project’s available build or verification steps to confirm the warning is gone.

Written by the indexing model from the issue text.