include "AbstractActionManager" and "FollowCameraInputsManager" with default ES6 export.

src/Actions/index.ts

@@ -1,3 +1,4 @@
+export * from "./abstractActionManager";
 export * from "./action";
 export * from "./actionEvent";
 export * from "./actionManager";

src/Cameras/index.ts

@@ -11,6 +11,7 @@ export * from "./deviceOrientationCamera";
 export * from "./flyCamera";
 export * from "./flyCameraInputsManager";
 export * from "./followCamera";
+export * from "./followCameraInputsManager";
 export * from "./gamepadCamera";
 export * from "./Stereoscopic/index";
 export * from "./universalCamera";