Make SerializerBuilder<TObject>.GetTargetMembers() stricter (fix #28) (+ trivial fixes)

## Overview

Re-submit of #30.

* Add a special targetting for members which isn't able to set but is addable collection or dictionary.
* There is a bug in `SerializerDebugging.ResetDependentAssemblies()` method: it doesn't writes out newline before the EOF. This makes invalid paths (perhaps) next test run. This PR fixes it.
* Components in `.nuget/` of this repo (or branch) is old, it fails to restore packages. This PR renew them.

## Notes

* All unit-tests are passed in my environment.
* I'm worried that the name of new private method, `CheckTargetEligibility`, might be not good. Please rename it if you need.

If there are any trouble, please tell me.