Generate warnings when using deprecated functions #961

Job	Run time
runefmt	1m 50s
rustfmt	7s
docs	1m 28s
clippy	2m 10s
basics	1s
miri_rune	5m 58s
miri_rune_alloc	5m 13s
no_default_features	56s
build_feature (capture-io)	54s
msrv	1m 58s
no_std_minimal	3m 19s
build_feature (cli,doc)	1m 33s
wasm	59s
build_feature (cli,fmt)	1m 45s
build_feature (cli)	1m 27s
build_feature (workspace)	53s
build_feature (languageserver)	1m 24s
build_feature (byte-code)	53s
test	11m 17s
	44m 5s

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