fix(plugin): fix rule type definition

src/engine/engine.ts

@@ -29,7 +29,7 @@ export class Engine<T extends Parser = Parser> {
 	protected report: Reporter;
 	protected config: Config;
 	protected ParserClass: new (config: Config) => T;
-	protected availableRules: { [key: string]: RuleConstructor };
+	protected availableRules: { [key: string]: RuleConstructor<any, any> };
 
 	public constructor(config: Config, ParserClass: new (config: Config) => T) {
 		this.report = new Reporter();
@@ -309,7 +309,7 @@ export class Engine<T extends Parser = Parser> {
 	protected initPlugins(
 		config: Config
 	): {
-		availableRules: { [key: string]: RuleConstructor };
+		availableRules: { [key: string]: RuleConstructor<any, any> };
 	} {
 		for (const plugin of config.getPlugins()) {
 			if (plugin.init) {
@@ -326,8 +326,10 @@ export class Engine<T extends Parser = Parser> {
 	 * Initializes all rules from plugins and returns an object with a mapping
 	 * between rule name and its constructor.
 	 */
-	protected initRules(config: Config): { [key: string]: RuleConstructor } {
-		const availableRules: { [key: string]: RuleConstructor } = {};
+	protected initRules(
+		config: Config
+	): { [key: string]: RuleConstructor<any, any> } {
+		const availableRules: { [key: string]: RuleConstructor<any, any> } = {};
 		for (const plugin of config.getPlugins()) {
 			for (const [name, rule] of Object.entries(plugin.rules || {})) {
 				availableRules[name] = rule;

src/integration.spec.ts

@@ -10,7 +10,7 @@ it("should compute correct line, column and offset when using transformed source
 	expect.assertions(2);
 
 	/* create a mock rule which reports error on root element */
-	class MockRule extends Rule {
+	class MockRule extends Rule<string, void> {
 		public setup(): void {
 			this.on("dom:ready", (event: DOMReadyEvent) => {
 				const root = event.document.root;

src/plugin/plugin.ts

@@ -56,7 +56,7 @@ export interface Plugin {
 	/**
 	 * List of new rules present.
 	 */
-	rules?: Record<string, RuleConstructor>;
+	rules?: Record<string, RuleConstructor<any, any>>;
 
 	/**
 	 * Transformer available in this plugin.

src/rule.ts

@@ -25,7 +25,7 @@ export interface RuleDocumentation {
 	url?: string;
 }
 
-export type RuleConstructor = new (options?: any) => Rule;
+export type RuleConstructor<T, U> = new (options?: any) => Rule<T, U>;
 
 export abstract class Rule<ContextType = void, OptionsType = void> {
 	private reporter: Reporter;