fix server-side parser for script tag

[pveyes]

Regression from #93

[codecov]

Codecov Report

Merging #115 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #115   +/-   ##
======================================
  Coverage    97.1%   97.1%           
======================================
  Files           5       5           
  Lines         138     138           
  Branches       47      47           
======================================
  Hits          134     134           
  Misses          2       2           
  Partials        2       2

Impacted Files	Coverage Δ
src/server.ts	97.5% <ø> (ø)	⬆️

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