refactor(getQueryStringParam): Escape all regex special characters in…

[boyandim]

… the name parameter.

Currently the method is escaping only for the "[" and "]". The main idea is to escape all special characters that can be used in the regex expression itself.

[codecov-io]

Current coverage is 100.00%

Merging #24 into master will not affect coverage as of 9c890e3

@@            master     #24   diff @@
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  Files            7       7       
  Stmts           26      26       
  Branches         0       0       
  Methods          0       0       
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  Hit             26      26       
  Partial          0       0       
  Missed           0       0       

Review entire Coverage Diff as of 9c890e3

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[kentcdodds]

Hi! Thanks for the contribution! A few things:

1. The commit message subject is too long. Could you shorten that a bit?
2. Could you add a test or two for your improved functionality?

Thanks!