Prepare release for `string-interner` version `0.16` #165

Job	Run time
Test (ubuntu-latest)	39s
Build (ubuntu-latest)	13s
Test (windows-latest)	2m 57s
Audit	6s
Build (windows-latest)	1m 58s
Clippy	12s
Test (macos-latest)	37s
Build (macos-latest)	17s
Documentation	12s
Formatting	12s
Outdated	9s
Test Memory Consumption (ubuntu-latest)	41s
Test Memory Consumption (windows-latest)	1m 22s
Coverage	5s
Test Memory Consumption (macos-latest)	32s
Miri	1m 11s
	11m 23s

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