fix: do not register the plugin twice

[anshumanv]

What kind of change does this PR introduce? fix

Did you add tests for your changes? yes

If relevant, did you update the documentation? NA

Summary we were registering plugin twice in some precompile logic which was redundant.

Does this PR introduce a breaking change? no

Other information

[codecov[bot]]

Codecov Report

Merging #183 (d994567) into master (a0237cc) will decrease coverage by 1.87%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #183      +/-   ##
==========================================
- Coverage   88.54%   86.66%   -1.88%     
==========================================
  Files           3        3              
  Lines         192      180      -12     
  Branches       39       38       -1     
==========================================
- Hits          170      156      -14     
- Misses         20       22       +2     
  Partials        2        2              

Impacted Files	Coverage Δ
src/plugin.js	78.94% <ø> (-5.15%)	:arrow_down:

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