Merge pull request #612 from lasantosr/feature/keep-unknown-variants #1137

Job	Run time
Docs	1m 5s
Check Examples	1m 4s
format	15s
clippy (default-tls)	1m 25s
Stripe Mock Tests (default-tls)	1m 36s
clippy (rustls-tls-webpki-roots)	1m 30s
Test Clients (default-tls)	1m 56s
Stripe Mock Tests (rustls-tls-webpki-roots)	1m 35s
clippy (rustls-tls-native)	1m 28s
verify-codegen-crate	1m 52s
Stripe Mock Tests (rustls-tls-native)	1m 34s
Test Clients (rustls-tls-webpki-roots)	1m 51s
clippy (async-std-surf)	1m 32s
Test Clients (rustls-tls-native)	1m 54s
Test Clients (async-std-surf)	2m 3s
	22m 40s

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