fix: missing collapseSamePrefixes option default value (#448)

Author: ycs77

src/core/options.ts

@@ -11,6 +11,7 @@ export const defaultOptions: Omit<Required<Options>, 'include' | 'exclude' | 'tr
   dts: isPackageExists('typescript'),
 
   directoryAsNamespace: false,
+  collapseSamePrefixes: false,
   globalNamespaces: [],
 
   resolvers: [],