fix(aur): restrict owlry-core check() to unit tests

The integration test (server_test) loads native plugins which segfault
in the clean makepkg build environment. Use --lib to run only unit tests.

aur/owlry-core/PKGBUILD

@@ -28,7 +28,7 @@ check() {
     cd "owlry"
     export RUSTUP_TOOLCHAIN=stable
     export CARGO_TARGET_DIR=target
-    cargo test -p owlry-core --frozen
+    cargo test -p owlry-core --frozen --lib
 }
 
 package() {