chore(deps-dev): bump excoveralls from 0.18.2 to 0.18.3 in the dev-dependencies group #190

Job	Run time
ash-ci / mix deps.get	6m 57s
ash-ci / MIX_ENV=dev mix.compile	3m 54s
ash-ci / audit	4m 24s
ash-ci / MIX_ENV=test mix.compile	3m 58s
ash-ci / mix docs	25s
ash-ci / mix credo --strict	31s
ash-ci / mix dialyzer	5m 19s
ash-ci / mix format --check-formatted	40s
ash-ci / mix ash.codegen --check	0s
ash-ci / mix sobelow	22s
ash-ci / mix spark.cheat_sheets --check	23s
ash-ci / mix spark.formatter --check	20s
ash-ci / mix test	47s
ash-ci / mix deps.unlock --check-unused	25s
ash-ci / Deploy docs to GitHub pages.	0s
ash-ci / Release	0s
	28m 25s

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