refactoring(cleanup): tests, interfaces cleanup

[rustatian]

Reason for This PR

• Code cleanup

Description of Changes

• Add Stop method to the pubsub interface to properly close underlying drivers and free up the associated resources.
• Tests cleanup
• Updated tests to run on Windows

License Acceptance

By submitting this pull request, I confirm that my contribution is made under the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.] [Reviewer TODO: Verify that these criteria are met. Request changes if not]

• [x] All commits in this PR are signed (git commit -s).
• [x] The reason for this PR is clearly provided (issue no. or explanation).
• [x] The description of changes is clear and encompassing.
• [x] Any required documentation changes (code and docs) are included in this PR.
• [x] Any user-facing changes are mentioned in CHANGELOG.md.
• [x] All added/changed functionality is tested.

[codecov[bot]]

Codecov Report

Merging #53 (38dfde0) into master (208cd4e) will increase coverage by 0.41%. The diff coverage is 94.03%.

@@            Coverage Diff             @@
##           master      #53      +/-   ##
==========================================
+ Coverage   67.13%   67.55%   +0.41%     
==========================================
  Files         110      110              
  Lines        9175     9233      +58     
==========================================
+ Hits         6160     6237      +77     
+ Misses       2386     2372      -14     
+ Partials      629      624       -5     

Impacted Files	Coverage Δ
boltdb/plugin.go	77.77% <ø> (-4.05%)	:arrow_down:
jobs/plugin.go	57.66% <ø> (+0.11%)	:arrow_up:
memory/plugin.go	80.00% <ø> (-3.34%)	:arrow_down:
http/handler/request.go	77.92% <50.00%> (-2.76%)	:arrow_down:
redis/plugin.go	68.18% <50.00%> (-1.82%)	:arrow_down:
memcached/plugin.go	58.82% <85.71%> (ø)
memcached/memcachedkv/driver.go	51.87% <92.30%> (ø)
memory/memorypubsub/pubsub.go	87.71% <92.30%> (+0.44%)	:arrow_up:
redis/kv/kv.go	57.73% <92.30%> (+0.50%)	:arrow_up:
redis/pubsub/pubsub.go	72.86% <94.73%> (+3.51%)	:arrow_up:
... and 14 more

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