TypeScript: Create and export types for routerActions so they can be …

…imported and used in definitions (@afholderman in supasate#189)

index.d.ts

@@ -43,12 +43,18 @@ declare module 'connected-react-router' {
   export function goBack(): CallHistoryMethodAction;
   export function goForward(): CallHistoryMethodAction;
 
+  export type Push = typeof push;
+  export type Replace = typeof replace;
+  export type Go = typeof go;
+  export type GoBack = typeof goBack;
+  export type GoForward = typeof goForward;
+
   export const routerActions: {
-    push: typeof push;
-    replace: typeof replace;
-    go: typeof go;
-    goBack: typeof goBack;
-    goForward: typeof goForward;
+    push: Push;
+    replace: Replace;
+    go: Go;
+    goBack: GoBack;
+    goForward: GoForward;
   };
 
   export interface LocationActionPayload {