feat: add types (#6)

closes #5

README.md

@@ -1,6 +1,6 @@
 # @qiwi/npm-registry-client
 
-The fork of [npm/npm-registry-client](https://github.com/npm/npm-registry-client) that fixes the most vulnerabilities and brings deps from 2020
+The fork of [npm/npm-registry-client](https://github.com/npm/npm-registry-client) that fixes the most vulnerabilities, brings deps from 2020 and adds some typings.
 
 ## Install
 ```shell script

index.d.ts

@@ -0,0 +1,49 @@
+declare module '@qiwi/npm-registry-client' {
+  import { ReadStream } from 'fs'
+  type TAuth = { alwaysAuth?: boolean } & (
+    {
+      username: string
+      password: string
+      email?: string
+    } | { token: string })
+
+  type TPackage = {
+    version: string
+    message: string
+  }
+
+  type TCallback<T = any> = (error: any, data: T, raw: any, res: any) => void
+
+  type TPackageMetadata = {
+    name: string
+    version: string
+  }
+
+  type TAccess = 'public' | 'restricted'
+
+  class RegClient {
+    deprecate(
+      uri: string,
+      params: TPackage & { auth: TAuth },
+      cb: TCallback
+    ): void
+
+    get(
+      uri: string,
+      params: any,
+      cb: TCallback
+    ): void
+
+    publish(
+      uri: string,
+      params: {
+        metadata: TPackageMetadata
+        access: TAccess
+        auth: TAuth
+        body: ReadStream
+      },
+      cb: TCallback
+    ): void
+  }
+  export = RegClient
+}

package.json

@@ -6,6 +6,10 @@
   "publishConfig": {
     "access": "public"
   },
+  "types": "index.d.ts",
+  "typescript": {
+    "definition": "index.d.ts"
+  },
   "private": false,
   "repository": {
     "type": "git",
@@ -22,7 +26,8 @@
   },
   "files": [
     "lib",
-    "index.js"
+    "index.js",
+    "index.d.ts"
   ],
   "dependencies": {
     "concat-stream": "^2.0.0",