build(deps): update prometheus-client requirement from <0.18,>=0.6 to >=0.6,<0.20

[dependabot[bot]]

Updates the requirements on prometheus-client to permit the latest version.

Release notes

Sourced from prometheus-client's releases.

0.19.0 / 2023-11-20

What's Changed

[FEATURE] support HTTPS/TLS in start_http_server. #946 [BUGFIX] fix: error in determining timestamp less than. #979

Commits

• 2dcd17e Release 0.19.0
• d8306b7 Merge pull request #980 from prometheus/fix-doc-site-build
• 2fcdfa6 Remove public/api check copied from client_java
• dc14069 Add documentation site (#974)
• fae24b7 Merge pull request #979 from weidongkl/master
• da8d29d fix: error in determining timestamp less than
• 3d78630 support HTTPS/TLS. (#946)
• a000193 Release 0.18.0
• ea78128 Allow enabling/disabling _created metrics from code (#973)
• 546599b Add mostrecent aggregation to Gauge (#967)
• Additional commits viewable in compare view

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