Update dependency morgan to v1.9.0

[mend-for-github-com]

This PR contains the following updates:

Package	Type	Update	Change
morgan	dependencies	minor	1.7.0 -> 1.9.0

By merging this PR, the issue #48 will be automatically resolved and closed:

Severity	CVSS Score	CVE
High	9.8	CVE-2019-5413
Medium	5.3	CVE-2017-16137

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Release Notes

expressjs/morgan

v1.9.0

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• Use res.headersSent when available
• deps: basic-auth@~2.0.0
  • Use safe-buffer for improved Buffer API
• deps: debug@2.6.9
• deps: depd@~1.1.1
  • Remove unnecessary Buffer loading

v1.8.2

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• deps: debug@2.6.8
  • Fix DEBUG_MAX_ARRAY_LENGTH
  • deps: ms@2.0.0

v1.8.1

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• deps: debug@2.6.1
  • Fix deprecation messages in WebStorm and other editors
  • Undeprecate DEBUG_FD set to 1 or 2

v1.8.0

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• Fix sending unnecessary undefined argument to token functions
• deps: basic-auth@~1.1.0
• deps: debug@2.6.0
  • Allow colors in workers
  • Deprecated DEBUG_FD environment variable
  • Fix error when running under React Native
  • Use same color for same namespace
  • deps: ms@0.7.2
• perf: enable strict mode in compiled functions

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