[Snyk] Security upgrade sjcl from 1.0.8 to 1.0.9

[adamlaska]

Snyk has created this PR to fix 1 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• packages/bitcore-wallet-service/package.json
• packages/bitcore-wallet-service/package-lock.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Improper Verification of Cryptographic Signature SNYK-JS-SJCL-15369617	614

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