Node: specify UnhandledRejectionListener reason param type (DefinitelyTyped#37751)

Author: OliverJAsh

types/node/v10/globals.d.ts

@@ -656,7 +656,7 @@ declare namespace NodeJS {
     type ExitListener = (code: number) => void;
     type RejectionHandledListener = (promise: Promise<any>) => void;
     type UncaughtExceptionListener = (error: Error) => void;
-    type UnhandledRejectionListener = (reason: any, promise: Promise<any>) => void;
+    type UnhandledRejectionListener = (reason: {} | null | undefined, promise: Promise<any>) => void;
     type WarningListener = (warning: Error) => void;
     type MessageListener = (message: any, sendHandle: any) => void;
     type SignalsListener = (signal: Signals) => void;

types/node/v8/base.d.ts

@@ -492,7 +492,7 @@ declare namespace NodeJS {
     type ExitListener = (code: number) => void;
     type RejectionHandledListener = (promise: Promise<any>) => void;
     type UncaughtExceptionListener = (error: Error) => void;
-    type UnhandledRejectionListener = (reason: any, promise: Promise<any>) => void;
+    type UnhandledRejectionListener = (reason: {} | null | undefined, promise: Promise<any>) => void;
     type WarningListener = (warning: Error) => void;
     type MessageListener = (message: any, sendHandle: any) => void;
     type SignalsListener = () => void;

types/node/v9/base.d.ts

@@ -629,7 +629,7 @@ declare namespace NodeJS {
     type ExitListener = (code: number) => void;
     type RejectionHandledListener = (promise: Promise<any>) => void;
     type UncaughtExceptionListener = (error: Error) => void;
-    type UnhandledRejectionListener = (reason: any, promise: Promise<any>) => void;
+    type UnhandledRejectionListener = (reason: {} | null | undefined, promise: Promise<any>) => void;
     type WarningListener = (warning: Error) => void;
     type MessageListener = (message: any, sendHandle: any) => void;
     type SignalsListener = (signal: Signals) => void;