get rid of Obj.magic in doLoadRouteRenderer

also made unsafe_toPrepareProps safer
removed unsafe makeRenderer

examples/client-rendering/src/routes/Root__Todos__ByStatus_route_renderer.res

@@ -1,8 +1,8 @@
-let renderer = Routes.Root.Todos.ByStatus.Route.makeRenderer(
-  ~prepare=_props => {
+let renderer: Routes.Root.Todos.ByStatus.Route.routeRenderer<'prepared> = {
+  prepare: _props => {
     ()
   },
-  ~render=_props => {
+  render: _props => {
     React.null
   },
-)
+}

examples/client-rendering/src/routes/Root__Todos__Single_route_renderer.res

@@ -1,5 +1,5 @@
-let renderer = Routes.Root.Todos.Single.Route.makeRenderer(
-  ~prepare=({environment, showMore, todoId}) => {
+let renderer: Routes.Root.Todos.Single.Route.routeRenderer<'prepared> = {
+  prepare: ({environment, params: {showMore, todoId}}) => {
     SingleTodoQuery_graphql.load(
       ~environment,
       ~fetchPolicy=StoreOrNetwork,
@@ -9,7 +9,7 @@ let renderer = Routes.Root.Todos.Single.Route.makeRenderer(
       },
     )
   },
-  ~render=({prepared}) => {
+  render: ({prepared}) => {
     <SingleTodo queryRef=prepared />
   },
-)
+}

examples/client-rendering/src/routes/Root__Todos_route_renderer.res

@@ -1,8 +1,8 @@
-let renderer = Route__Root__Todos_route.makeRenderer(
-  ~prepare=({environment}) => {
+let renderer: Route__Root__Todos_route.routeRenderer<'prepared> = {
+  prepare: ({environment}) => {
     TodosListQuery_graphql.load(~environment, ~fetchPolicy=StoreOrNetwork, ~variables=())
   },
-  ~render=({prepared, childRoutes}) => {
+  render: ({prepared, childRoutes}) => {
     <TodosList queryRef=prepared> {childRoutes} </TodosList>
   },
-)
+}

examples/client-rendering/src/routes/Root_route_renderer.res

@@ -1,8 +1,8 @@
-let renderer = Route__Root_route.makeRenderer(
-  ~prepare=({environment}) => {
+let renderer: Routes.Root.Route.routeRenderer<'prepared> = {
+  prepare: ({environment}) => {
     LayoutQuery_graphql.load(~environment, ~variables=(), ~fetchPolicy=StoreOrNetwork)
   },
-  ~render=props => {
+  render: props => {
     <Layout queryRef=props.prepared> {props.childRoutes} </Layout>
   },
-)
+}