update to use handlebars v5 (#661) #897

Job	Run time
runefmt	1m 44s
clippy	2m 15s
rustfmt	13s
docs	1m 55s
basics	1s
msrv	33s
miri_rune_alloc	4m 17s
miri_rune	5m 52s
build_feature (capture-io)	55s
no_default_features	59s
build_feature (cli,doc)	1m 31s
no_std_minimal	38s
build_feature (cli,fmt)	1m 32s
wasm	1m 28s
build_feature (cli)	1m 35s
build_feature (workspace)	56s
build_feature (languageserver)	1m 35s
build_feature (byte-code)	1m 2s
test	0s
	29m 1s

Provide feedback