[IMP] types: make component generic types optional

In most cases, we just want Component<any, Env>. But since it was so
annoying to have always the type Env, we actually used
Component<any,any> everywhere.

With this commit, the generic types have a default (and their order is
swapped), so we can simply use Component in most cases, and
Component<Props> when we want to type the props.

src/component/fiber.ts

@@ -50,7 +50,7 @@ export class Fiber {
 
   scope: any;
 
-  component: Component<any, any>;
+  component: Component;
   vnode: VNode | null = null;
 
   root: Fiber;
@@ -61,7 +61,7 @@ export class Fiber {
 
   error?: Error;
 
-  constructor(parent: Fiber | null, component: Component<any, any>, force, inserter) {
+  constructor(parent: Fiber | null, component: Component, force: boolean, inserter) {
     this.component = component;
     this.force = force;
     this.inserter = inserter;