chore(sol-types): make PanicKind non_exhaustive #1321

Job	Run time
feature-checks	1m 38s
miri --no-default-features	2m 34s
clippy	46s
miri	2m 39s
test stable --no-default-features	55s
wasm	20s
miri --all-features	3m 14s
test stable	2m 35s
test stable --all-features	57s
test beta --no-default-features	1m 0s
docs	30s
fmt	14s
test beta	54s
test beta --all-features	59s
test nightly --no-default-features	1m 1s
test nightly	59s
test nightly --all-features	1m 7s
test 1.65 --no-default-features	1m 55s
test 1.65	1m 54s
test 1.65 --all-features	2m 5s
	28m 16s

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