Hide internals of values #898

Job	Run time
docs	1m 27s
clippy	1m 35s
runefmt	1m 49s
rustfmt	8s
basics	1s
msrv	1m 26s
no_default_features	56s
build_feature (capture-io)	47s
miri_rune	5m 0s
miri_rune_alloc	4m 22s
no_std_minimal	3m 45s
build_feature (cli,doc)	1m 26s
build_feature (cli,fmt)	1m 24s
wasm	51s
build_feature (cli)	1m 28s
build_feature (workspace)	48s
build_feature (languageserver)	1m 16s
build_feature (byte-code)	46s
test	11m 48s
	41m 3s

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