fix: decodeURI before searching query

[hunterliu1003]

This should fix #54 by decodeURI request url before searching query

[codecov-commenter]

Codecov Report

Merging #55 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #55   +/-   ##
=======================================
  Coverage   93.41%   93.41%           
=======================================
  Files          13       13           
  Lines         410      410           
  Branches       76       76           
=======================================
  Hits          383      383           
  Misses         24       24           
  Partials        3        3           

Impacted Files	Coverage Δ
lib/middleware.js	94.54% <100.00%> (ø)

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[hunterliu1003]

This is my first time contributing an open source project

if there is anything that can be improved, please let me know