[Snyk] Upgrade org.hdrhistogram:HdrHistogram from 2.1.7 to 2.1.12

[snyk-bot]

Snyk has created this PR to upgrade org.hdrhistogram:HdrHistogram from 2.1.7 to 2.1.12.

:sparkles: Snyk has automatically assigned this pull request, [set who gets assigned](https://app.snyk.io/org/giltene/project/1c52815f-19d3-487a-bce9-1879eb52f474/settings/integration?utm_source=github&utm_medium=upgrade-pr/settings/integration).

:information_source: Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

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• The recommended version is 5 versions ahead of your current version.
• The recommended version was released a year ago, on 2019-12-10.

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