Add typescript definitions

Author: doomsower

index.d.ts

@@ -0,0 +1,19 @@
+import React from 'react';
+
+export interface FallbackProps {
+  error?: Error;
+  componentStack?: string;
+}
+
+export interface ErrorBoundaryProps {
+  onError?: (error: Error, componentStack: string) => void;
+  FallbackComponent?: React.ComponentType<FallbackProps>;
+}
+
+export function withErrorBoundary<P>(
+  ComponentToDecorate: React.ComponentType<P>,
+  CustomFallbackComponent?: React.ComponentType<FallbackProps>,
+  onErrorHandler?: (error: Error, componentStack: string) => void,
+): React.ComponentType<P>;
+
+export default class ErrorBoundary extends React.Component<ErrorBoundaryProps>{}