Add `!^` and `!$` operator #1697

Job	Run time
check	1m 10s
test x86_64-unknown-linux-gnu (stable)	1m 20s
test x86_64-unknown-linux-gnu (beta)	1m 20s
test x86_64-unknown-linux-gnu (nightly)	1m 20s
test x86_64-apple-darwin (stable)	1m 16s
test x86_64-apple-darwin (beta)	1m 14s
test x86_64-apple-darwin (nightly)	1m 14s
test x86_64-pc-windows-gnu (stable)	1m 19s
test i686-pc-windows-msvc (stable)	1m 19s
fuzz record_ref	1m 21s
fuzz select_query	1m 22s
fuzz byte_record	1m 20s
fuzz fuzz_path	1m 19s
cross x86_64-unknown-linux-gnu (stable)	1m 18s
cross x86_64-unknown-linux-gnu (beta)	1m 19s
cross x86_64-unknown-linux-gnu (nightly)	1m 20s
cross x86_64-unknown-linux-musl (stable)	1m 19s
cross aarch64-unknown-linux-gnu (stable)	1m 19s
cross aarch64-unknown-linux-musl (stable)	1m 21s
fmt	1s
clippy	1s
book	1s
audit	1s
udeps	1s
upgrades	1s
gh-pages	1s
	24m 57s

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