fix: update to classy-solid, lowclass, and add tests to ensure that o…

…verriden subclass fields decorated with @element do not lose reactivity

update internals based on classy-solid

BREAKING: update decorator paramter types with types from latest TypeScript instead of our own types. This may require updating your TypeScript version and fixing some spots where decorators are used be parameters are no long type `any`.

dist/LumeElement.d.ts

@@ -11,8 +11,6 @@ declare class LumeElement extends HTMLElement {
     static observedAttributes?: string[] | Record<string, AttributeHandler>;
     private __attributesToProps?;
     protected _preUpgradeValues: Map<PropertyKey, unknown>;
-    protected __propsSetAtLeastOnce__?: Set<PropertyKey>;
-    protected __reactifiedProps__?: Set<PropertyKey>;
     protected ___init___: void;
     private __handleInitialPropertyValuesIfAny;
     protected template?: Template;

dist/attribute.d.ts

@@ -1,7 +1,8 @@
 import type { ElementCtor } from './element.js';
 export declare const __classFinishers: ((Class: ElementCtor) => void)[];
-export declare function attribute(handler?: AttributeHandler): (value: any, context: any) => any;
-export declare function attribute(value: any, context: any): any;
+type AttributeDecoratorContext = ClassFieldDecoratorContext | ClassGetterDecoratorContext | ClassSetterDecoratorContext;
+export declare function attribute(handler?: AttributeHandler): (value: unknown, context: AttributeDecoratorContext) => any;
+export declare function attribute(value: unknown, context: AttributeDecoratorContext): any;
 export declare namespace attribute {
     var string: AttributeType<string>;
     var number: AttributeType<number>;