Support Typescript 4.1, dependency upgrade.

src/structure/spec_model/BaseModel.struct.ts

@@ -14,6 +14,6 @@ export abstract class BaseModelStructure<T> extends BaseFileStructure implements
         super(absoluteRoot, relativeRoot, structRoot)
     }
 
-    public abstract async getSpecModel(): Promise<T[]>
+    public abstract getSpecModel(): Promise<T[]>
 
 }

src/structure/spec_model/module/Module.struct.ts

@@ -86,10 +86,10 @@ export abstract class ModuleStructure extends BaseModelStructure<Module> {
         return null
     }
 
-    protected async abstract getModuleId(name: string, path: string): Promise<string>
-    protected async abstract getModuleName(name: string, path: string): Promise<string>
-    protected async abstract getModuleUrl(name: string, path: string, stats: Stats): Promise<string>
-    protected async abstract getModulePath(name: string, path: string, stats: Stats): Promise<string | null>
+    protected abstract getModuleId(name: string, path: string): Promise<string>
+    protected abstract getModuleName(name: string, path: string): Promise<string>
+    protected abstract getModuleUrl(name: string, path: string, stats: Stats): Promise<string>
+    protected abstract getModulePath(name: string, path: string, stats: Stats): Promise<string | null>
 
     protected async parseModule(file: string, filePath: string, stats: Stats): Promise<Module> {