Update dependency org.mindrot:jbcrypt to v0.4

[dev-mend-for-github-com[bot]]

This PR contains the following updates:

Package	Type	Update	Change
org.mindrot:jbcrypt	compile	minor	0.3m -> 0.4

By merging this PR, the issue #30 will be automatically resolved and closed:

Severity	CVSS Score	CVE	Reachability
Medium	5.3	CVE-2015-0886

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