Always expect version to be in initial state in case key was removed

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 60.00000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 80.05%. Comparing base (fdeb965) to head (89c642b).

Files	Patch %	Lines
leakybucket.go	50.00%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #42 +/- ## ======================================= Coverage 80.05% 80.05% ======================================= Files 12 12 Lines 1449 1449 ======================================= Hits 1160 1160 Misses 212 212 Partials 77 77 ```

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