[Snyk] Upgrade query-string from 6.2.0 to 6.9.0

[snyk-bot]

Snyk has created this PR to upgrade query-string from 6.2.0 to 6.9.0.

ℹ️ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

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• The recommended version is 11 versions ahead of your current version.
• The recommended version was released 22 days ago, on 2019-11-13.

Release notes

Package name: query-string

• 6.9.0 - 2019-11-13
  
  • Add option to skip keys with the value of null in .stringify() (#215) 20d8069
  • Only parse + to space when decode is true (#214) e20ab65

  v6.8.3...v6.9.0

• 6.8.3 - 2019-08-31
  
  • Make parseNumbers and parseBooleans options work with arrayFormat (#202) d2451aa

  v6.8.2...v6.8.3

• 6.8.2 - 2019-07-26
  
  • Ensure empty string & spaces are parsed as string when parseNumber: true (#195) 504c29b

  v6.8.1...v6.8.2

• 6.8.1 - 2019-06-21
  
  • Fix using the parseNumbers and parseBooleans options together (#187) 90eb40e

  v6.8.0...v6.8.1

• 6.8.0 - 2019-06-20
  

  Enhancements:

  • Add parseBooleans option to .parse() (#183) f958329

  Fixes:

  • Fix the TypeScript types (#185) cba4c93

  v6.7.0...v6.8.0

• 6.7.0 - 2019-06-08
  
  • Add parseNumbers option to .parse() (#171) f7be831

  v6.6.0...v6.7.0

• 6.6.0 - 2019-06-05
  

  Enhancements:

  • Add sort option to .parse() (#177) b75ca4a

  Fixes:

  • Fix TypeScript 3.5 compatibility (#179) 13e22d7

  v6.5.0...v6.6.0

• 6.5.0 - 2019-04-28
  
  • Support stringifying array containing value 0 (#173) 317cb36
  • Support hash in .extract() (#174) 64a30da

  v6.4.2...v6.5.0

• 6.4.2 - 2019-03-27
  
  • Correctly handle query strings that contain = (#169) 78e321c

  v6.4.0...v6.4.2

• 6.4.0 - 2019-03-14
  
  • Add comma format to the arrayFormat option (#167) b22c2af
  • Fix the ParsedQuery TypeScript type (#170) 49d2203

  v6.3.0...v6.4.0

• 6.3.0 - 2019-03-03
• 6.2.0 - 2018-10-02

from query-string GitHub release notes

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