Add CI test

Author: benthecarman

ci/ci-tests.sh

@@ -38,6 +38,8 @@ for DIR in lightning lightning-invoice lightning-rapid-gossip-sync; do
 	# check that things still pass without grind_signatures
 	# note that outbound_commitment_test only runs in this mode, because of hardcoded signature values
 	cargo test --verbose --color always --no-default-features --features std
+	# check that compile with no-std and serde works
+	cargo test --verbose --color always --no-default-features --features no-std --features serde
 	# check if there is a conflict between no-std and the c_bindings cfg
 	RUSTFLAGS="--cfg=c_bindings" cargo test --verbose --color always --no-default-features --features=no-std
 	popd