[Snyk] Security upgrade jwk-to-pem from 2.0.3 to 2.0.6

[richardhyatt]

Snyk has created this PR to fix 5 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• package.json
• package-lock.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Improper Verification of Cryptographic Signature SNYK-JS-ELLIPTIC-7577916	776
	Improper Verification of Cryptographic Signature SNYK-JS-ELLIPTIC-7577917	776
	Improper Verification of Cryptographic Signature SNYK-JS-ELLIPTIC-7577918	776
	Cryptographic Issues SNYK-JS-ELLIPTIC-571484	706
	Cryptographic Issues SNYK-JS-ELLIPTIC-1064899	554

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• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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