chore(deps-dev): bump igniter from 0.5.16 to 0.5.20 in the dev-dependencies group #424

Job	Run time
ash-ci / mix igniter.upgrade	5s
ash-ci / audit	6m 28s
ash-ci / mix deps.get	4m 38s
ash-ci / MIX_ENV=test mix.compile	4m 7s
ash-ci / mix docs	1m 49s
ash-ci / mix ash.codegen --check	0s
ash-ci / MIX_ENV=dev mix.compile	4m 1s
ash-ci / mix credo --strict	4s
ash-ci / mix dialyzer	5m 51s
ash-ci / mix format --check-formatted	23s
ash-ci / mix sobelow	21s
ash-ci / mix spark.cheat_sheets --check	31s
ash-ci / mix spark.formatter --check	3s
ash-ci / mix test	48s
ash-ci / mix deps.unlock --check-unused	22s
ash-ci / Deploy docs to GitHub pages.	0s
ash-ci / NIF ${{ matrix.nif }} - ${{ matrix.job.target }} (${{ matrix.job.os }})	0s
ash-ci / Release	0s
	29m 31s

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