Add typescript definition

Author: janpieterz

index.d.ts

@@ -0,0 +1,28 @@
+export interface AppAuthInput {
+    scopes: string[];
+    issuer: string;
+    clientId: string;
+    redirectUrl: string;
+    aditionalParameters?: object;
+  }
+
+  export interface AuthorizeResult {
+    accessToken: string;
+    accessTokenExpirationDate: string;
+    additionalParameters: object;
+    idToken: string;
+    refreshToken: string;
+    tokenType: string;
+  }
+
+  export function authorize(properties: AppAuthInput): Promise<AuthorizeResult>;
+
+  export function refresh(
+    properties: AppAuthInput,
+    { refreshToken: string }
+  ): Promise<AuthorizeResult>;
+
+  export function revoke(
+    properties: AppAuthInput,
+    { tokenToRevoke: string, sendClientId: boolean }
+): Promise<void>;

package.json

@@ -3,6 +3,7 @@
   "version": "2.0.0",
   "description": "React Native bridge for AppAuth for supporting any OAuth 2 provider",
   "main": "index.js",
+  "types": "index.d.ts",
   "scripts": {
     "test": "jest",
     "lint": "eslint .",