invert __contains__ logic for Any-/EmptySpecifier (#13)

Author: felixp98

src/dep_logic/specifiers/special.py

@@ -36,7 +36,7 @@ def is_empty(self) -> bool:
         return True
 
     def __contains__(self, value: str) -> bool:
-        return True
+        return False
 
 
 class AnySpecifier(BaseSpecifier):
@@ -72,4 +72,4 @@ def is_any(self) -> bool:
         return True
 
     def __contains__(self, value: str) -> bool:
-        return False
+        return True