Fix typing for InternalDependency.get_as_static() and get_as_shared()

mesonbuild/dependencies/base.py

@@ -353,14 +353,14 @@ class InternalDependency(Dependency):
         new_dep.libraries = []
         return new_dep
 
-    def get_as_static(self, recursive: bool) -> Dependency:
+    def get_as_static(self, recursive: bool) -> InternalDependency:
         new_dep = copy.copy(self)
         new_dep.libraries = [lib.get('static') for lib in self.libraries]
         if recursive:
             new_dep.ext_deps = [dep.get_as_static(True) for dep in self.ext_deps]
         return new_dep
 
-    def get_as_shared(self, recursive: bool) -> Dependency:
+    def get_as_shared(self, recursive: bool) -> InternalDependency:
         new_dep = copy.copy(self)
         new_dep.libraries = [lib.get('shared') for lib in self.libraries]
         if recursive: