[Snyk] Fix for 2 vulnerabilities

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `maven` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • VM-Core/pom.xml

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Upgrade	Breaking Change	Exploit Maturity
	661/1000 Why? Recently disclosed, Has a fix available, CVSS 7.5	Denial of Service (DoS) SNYK-JAVA-ORGAPACHEPDFBOX-1304912	org.apache.pdfbox:pdfbox: 2.0.16 -> 2.0.24 org.apache.pdfbox:pdfbox-tools: 2.0.16 -> 2.0.24	No	No Known Exploit
	661/1000 Why? Recently disclosed, Has a fix available, CVSS 7.5	Denial of Service (DoS) SNYK-JAVA-ORGAPACHEPDFBOX-1304913	org.apache.pdfbox:pdfbox: 2.0.16 -> 2.0.24 org.apache.pdfbox:pdfbox-tools: 2.0.16 -> 2.0.24	No	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Check the changes in this PR to ensure they won't cause issues with your project.

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[AppVeyorBot]

:white_check_mark: Build validation-manager VM master build 110 completed (commit https://github.com/javydreamercsw/validation-manager/commit/bdd769dae8 by @snyk-bot)

[AppVeyorBot]

:white_check_mark: Build validation-manager VM master build 110 completed (commit https://github.com/javydreamercsw/validation-manager/commit/bdd769dae8 by @snyk-bot)