feat: add typescript support

.gitignore

@@ -1,3 +1,4 @@
+.DS_Store
 # Logs
 logs
 *.log

index.d.ts

@@ -0,0 +1,18 @@
+import {
+  FastifyPluginCallback,
+  FastifyPluginAsync,
+} from 'fastify'
+
+export interface TrapsPluginOptions {
+  timeout: number,
+  onSignal: (signal: 'SIGTERM' | 'SIGINT') => {},
+  onClose: () => {},
+  onTimeout: (timeout: number) => {},
+  onError: (error: Error|any) => {},
+  strict: boolean
+}
+
+export const trapsPluginCallback: FastifyPluginCallback<TrapsPluginOptions>;
+export const trapsPluginAsync: FastifyPluginAsync<TrapsPluginOptions>;
+
+export default trapsPluginCallback;