make getPackageJsonPackages configurable

src/def/interfaces.ts

@@ -8,4 +8,6 @@ export interface KoishiConfig {
 
 export interface PackageConfig {
   dependencies: Record<string, string>;
+  devDependencies: Record<string, string>;
+  peerDependencies: Record<string, string>;
 }

src/utils/read-package-json.ts

 import loadJsonFile from 'load-json-file';
 import { PackageConfig } from '../def/interfaces';
 
-export async function getPackageJsonPackages() {
-  const { dependencies } = await loadJsonFile<PackageConfig>('./package.json');
-  return dependencies;
+export async function getPackageJsonPackages(
+  path = './package.json',
+  type: keyof PackageConfig = 'dependencies',
+) {
+  const json = await loadJsonFile<PackageConfig>(path);
+  return json[type];
 }