Hide internals of values #889

Job	Run time
docs	1m 19s
runefmt	1m 42s
clippy	1m 25s
rustfmt	6s
basics	1s
msrv	1m 13s
miri_rune	4m 46s
miri_rune_alloc	4m 32s
no_default_features	42s
build_feature (capture-io)	53s
build_feature (cli,doc)	1m 21s
no_std_minimal	2m 13s
wasm	46s
build_feature (cli,fmt)	1m 18s
build_feature (cli)	1m 14s
build_feature (workspace)	57s
build_feature (languageserver)	1m 12s
build_feature (byte-code)	40s
test	4m 56s
	31m 16s

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