[Snyk] Upgrade prop-types from 15.6.0 to 15.7.2

[snyk-bot]

Snyk has created this PR to upgrade prop-types from 15.6.0 to 15.7.2.

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 5 versions ahead of your current version.
• The recommended version was released a year ago, on 2019-02-13.

The recommended version fixes:

Severity	Issue	Exploit Maturity
	Regular Expression Denial of Service (ReDoS) npm:ua-parser-js:20180227	Proof of Concept

Release notes

Package name: prop-types

• 15.7.2 - 2019-02-13
  

  v15.7.2

• 15.7.1 - 2019-02-11
  

  v15.7.1

• 15.7.0 - 2019-02-10
  

  v15.7.0

• 15.6.2 - 2018-06-19
  

  v15.6.2

• 15.6.1 - 2018-02-26
  

  15.6.1

• 15.6.0 - 2017-09-25
  

  v15.6.0

from prop-types GitHub release notes

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[coveralls]

Pull Request Test Coverage Report for Build 85

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.5%) to 99.34%

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Totals
Change from base Build 70:	0.5%
Covered Lines:	255
Relevant Lines:	255

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 85

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.5%) to 99.34%

---

Totals
Change from base Build 70:	0.5%
Covered Lines:	255
Relevant Lines:	255

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💛 - Coveralls

[3rd-Eden]

Fixed in 4.2.0