Hide internals of values #888

Job	Run time
rustfmt	15s
runefmt	1m 57s
clippy	1m 41s
docs	1m 37s
basics	1s
no_default_features	46s
miri_rune	5m 26s
miri_rune_alloc	4m 10s
build_feature (capture-io)	1m 7s
msrv	2m 27s
build_feature (cli,doc)	1m 19s
wasm	58s
no_std_minimal	3m 16s
build_feature (cli,fmt)	1m 28s
build_feature (cli)	1m 27s
build_feature (workspace)	58s
build_feature (languageserver)	1m 20s
build_feature (byte-code)	52s
test	4m 27s
	35m 32s

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