fix(deps): update module go.hollow.sh/serverservice to v0.16.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
go.hollow.sh/serverservice	require	minor	v0.15.5 -> v0.16.0

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Release Notes

metal-toolbox/hollow-serverservice (go.hollow.sh/serverservice)

v0.16.0

Compare Source

Changelog

• 84744ff Add pagination support to ComponentFirmwareVersion (#​227)
• 87a0c2b Also update username when credentials are updated (#​225)
• 94b3a8b ComponentFirmwareVersion json tag to be consistent (#​224)
• 41d1838 Makefile: update to include various helpers commands
• accfa6f api/v1/attribute_list_params: add a few comments to describe the SQL query modifiers
• cf5890d api/v1/attribute_list_params: implement support for Attribute Operators
• 7f63c49 api/v1/atttribute_list_params: move JSONB query builder into its own method and add tests
• ac2c6eb api/v1/firmware_sets: firmware set updates should persist attribute information
• a008189 api/v1/firmware_sets: update fixtures and tests for AttributeOperators
• c424580 api/v1/router_firmware_set_test: fix typo in test name
• 6a5a33c db/migrations: adds constraint on firmware sets to restrict fimrmware deletion
• 5ee3b2d dbtools/testtools: cleanDB() to log errors if any fixture fails to delete as part of tests
• 254924c go: update direct and test dependencies
• 97b483f update misc dependencies reported by renovate

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