fix: ts definition

Author: clarkdo

index.d.ts

@@ -1,8 +1,38 @@
+declare module 'postcss-import-resolver' {
+  interface AliasItem {
+    alias: string;
+    name: string;
+    onlyModule?: boolean;
+  }
 
-import { ResolverFactory } from 'enhanced-resolve'
+  interface Dictionary<T> {
+    [key: string]: T;
+  }
 
-declare function resolver(config: ResolverFactory.ResolverOption): Function;
+  interface Plugin {
+    apply(...args: any[]): void;
+  }
 
-declare module 'postcss-import-resolver' {
-  export = resolver;
+  interface ResolverOption {
+    alias?: AliasItem[] | Dictionary<string>;
+    aliasFields?: string[];
+    cachePredicate?: (val: Object) => boolean;
+    descriptionFiles?: string[];
+    enforceExtension?: boolean;
+    enforceModuleExtension?: boolean;
+    extensions?: string[];
+    fileSystem?: Object;
+    mainFields?: string[];
+    mainFiles?: string[];
+    moduleExtensions?: string[];
+    modules?: string[];
+    plugins?: Plugin[];
+    resolver?: Object;
+    resolveToContext?: boolean;
+    symlinks?: string[] | boolean;
+    unsafeCache?: boolean | Dictionary<any>;
+    useSyncFileSystemCalls?: boolean;
+  }
+
+  export default function resolver(config: ResolverOption): Function
 }