Using custom @screeps/common fork to avoid restarting common/storage process

[brisberg]

#30 Fixes

I am using a forked version of @screeps/common which avoids printing console errors on connection failure and avoid restarting the connection socket on connection end.

This allows the common/storage to actually end when the test cleans up.

https://github.com/screeps/common/compare/master...brisberg:no-storage-restart

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I will work on preparing the change to @screeps/common as a clean change, but this will work for the moment.

Let me know what you think.