fix(serverless): fix serverless typings

package.json

@@ -46,7 +46,7 @@
     "@types/jest": "^26.0.14",
     "@types/node": "^12.12.38",
     "@types/ramda": "^0.27.6",
-    "@types/serverless": "^1.78.12",
+    "@types/serverless": "^1.78.18",
     "@typescript-eslint/eslint-plugin": "^4.2.0",
     "@typescript-eslint/parser": "^4.2.0",
     "eslint": "^7.9.0",

src/index.ts

@@ -5,7 +5,6 @@ import * as path from 'path';
 import { mergeRight } from 'ramda';
 import * as Serverless from 'serverless';
 import * as Plugin from 'serverless/classes/Plugin';
-import * as Service from 'serverless/classes/Service';
 import * as chokidar from 'chokidar';
 
 import { extractFileNames } from './helper';
@@ -14,12 +13,6 @@ import { packExternalModules } from './pack-externals';
 const SERVERLESS_FOLDER = '.serverless';
 const BUILD_FOLDER = '.build';
 
-interface ServiceExtended extends Service {
-  service?: string;
-  package?: Serverless.Package;
-  functions?: Record<string, Serverless.FunctionDefinition>;
-}
-
 interface OptionsExtended extends Serverless.Options {
   verbose?: boolean;
 }
@@ -51,7 +44,7 @@ const DEFAULT_BUILD_OPTIONS: Partial<Configuration> = {
 export class EsbuildPlugin implements Plugin {
   private originalServicePath: string;
 
-  serverless: Serverless & { service: ServiceExtended };
+  serverless: Serverless;
   options: OptionsExtended;
   hooks: Plugin.Hooks;
   buildOptions: Configuration;