[Snyk] Fix for 19 vulnerabilities

[erpranavjoshi]

Snyk has created this PR to fix 19 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• package.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Arbitrary Code Injection SNYK-JS-XMLHTTPREQUESTSSL-1082936	243
	Denial of Service (DoS) npm:ws:20171108	220
	Prototype Poisoning SNYK-JS-QS-3153490	162
	Access Restriction Bypass SNYK-JS-XMLHTTPREQUESTSSL-1255647	149
	Regular Expression Denial of Service (ReDoS) SNYK-JS-PATHTOREGEXP-8482416	125
	Regular Expression Denial of Service (ReDoS) npm:parsejson:20170908	114
	Denial of Service (DoS) npm:ws:20160624	114
	Asymmetric Resource Consumption (Amplification) SNYK-JS-BODYPARSER-7926860	111
	Insecure Defaults npm:engine.io-client:20160426	110
	Cross-site Scripting SNYK-JS-EXPRESS-7926867	105
	Open Redirect SNYK-JS-EXPRESS-6474509	98
	Regular Expression Denial of Service (ReDoS) SNYK-JS-PATHTOREGEXP-7925106	89
	Cross-site Scripting SNYK-JS-SEND-7926862	79
	Cross-site Scripting SNYK-JS-SERVESTATIC-7926865	79
	Regular Expression Denial of Service (ReDoS) SNYK-JS-WS-1296835	63
	Regular Expression Denial of Service (ReDoS) npm:debug:20170905	58
	Insecure Randomness npm:ws:20160920	46
	Cross-site Scripting (XSS) SNYK-JS-COOKIE-8163060	44
	Regular Expression Denial of Service (ReDoS) npm:ms:20170412	40

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