Fix tests following additive feature changes (#450)

#430 made some features additive, but didn't properly address the tests
to run under the minimal requirements nor the scripts to run the tests.

This fixes that

payjoin/contrib/test.sh

@@ -3,4 +3,4 @@ set -e
 
 cargo test --locked --package payjoin --verbose --all-features --lib
 cargo test --locked --package payjoin --verbose --features=send,receive --test integration
-cargo test --locked --package payjoin --verbose --no-default-features --features=send,receive,_danger-local-https,v2 --test integration
+cargo test --locked --package payjoin --verbose --no-default-features --features=send,receive,_danger-local-https,v2,io --test integration

payjoin/tests/integration.rs

@@ -1,4 +1,4 @@
-#[cfg(all(feature = "send", feature = "receive", feature = "_danger-local-https"))]
+#[cfg(all(feature = "send", feature = "receive"))]
 mod integration {
     use std::collections::HashMap;
     use std::env;
@@ -171,7 +171,7 @@ mod integration {
         }
     }
 
-    #[cfg(all(feature = "io", feature = "v2"))]
+    #[cfg(all(feature = "io", feature = "v2", feature = "_danger-local-https"))]
     mod v2 {
         use std::sync::Arc;
         use std::time::Duration;