Fixing test so it runs correctly on Java 17+.

ioc.specs.StrategyRegistrySpec.access to types registered
diff --git a/tapestry-ioc/src/test/groovy/ioc/specs/StrategyRegistrySpec.groovy b/tapestry-ioc/src/test/groovy/ioc/specs/StrategyRegistrySpec.groovy
index 0b0cde4..9bf66cd 100644
--- a/tapestry-ioc/src/test/groovy/ioc/specs/StrategyRegistrySpec.groovy
+++ b/tapestry-ioc/src/test/groovy/ioc/specs/StrategyRegistrySpec.groovy
@@ -42,7 +42,7 @@
 
     then:
 
-    sr.types.size == 2
+    sr.types.size() == 2
     sr.types.containsAll(List, Map)
   }