Migrate to createPlugin

[ganemone]

Fixes #42

[codecov]

Codecov Report

Merging #43 into master will decrease coverage by 0.89%.
The diff coverage is 85%.

@@           Coverage Diff            @@
##           master     #43     +/-   ##
========================================
- Coverage    87.5%   86.6%   -0.9%     
========================================
  Files           4       4             
  Lines         112     112             
  Branches       16      16             
========================================
- Hits           98      97      -1     
- Misses          7       8      +1     
  Partials        7       7

Impacted Files	Coverage Δ
src/browser.js	90% <100%> (+0.34%)	⬆️
src/server.js	85.1% <82.35%> (-2.4%)	⬇️

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