Fail CI on bad dependencies

Author: djc

deny.toml

@@ -1,3 +1,8 @@
+[advisories]
+unmaintained = "deny"
+unsound = "deny"
+yanked = "deny"
+
 [licenses]
 allow-osi-fsf-free = "either"
 copyleft = "warn"
@@ -13,4 +18,4 @@ name = "ring"
 # compiled into non-test libraries, is included below."
 # OpenSSL - Obviously
 expression = "ISC AND MIT AND OpenSSL"
-license-files = [{ path = "LICENSE", hash = 0xbd0eed23 }]
+license-files = [{ path = "LICENSE", hash = 0xbd0eed23 }]