fix: filter .d.ts files from default loader strategy (#128)

* fix: filter `.d.ts` files from default loader strategy

* chore: committing fixes in the dark, seriously, who killed my power!?

permalink: http://whatthecommit.com/8684111065712cdc2d7894945c201e4b

* chore: asd

src/lib/strategies/LoaderStrategy.ts

@@ -16,6 +16,7 @@ import { classExtends, isClass } from './Shared';
 export class LoaderStrategy<T extends Piece> implements ILoaderStrategy<T> {
 	public clientUsesESModules = getRootData().type === 'ESM';
 	public supportedExtensions = ['.js', '.cjs', '.mjs'];
+	private readonly filterDtsFiles: boolean = false;
 
 	public constructor() {
 		/**
@@ -28,6 +29,7 @@ export class LoaderStrategy<T extends Piece> implements ILoaderStrategy<T> {
 		 */
 		if (Reflect.has(process, Symbol.for('ts-node.register.instance')) || !isNullish(process.env.TS_NODE_DEV)) {
 			this.supportedExtensions.push('.ts');
+			this.filterDtsFiles = true;
 		}
 	}
 
@@ -36,6 +38,8 @@ export class LoaderStrategy<T extends Piece> implements ILoaderStrategy<T> {
 		const extension = extname(path);
 		if (!this.supportedExtensions.includes(extension)) return null;
 
+		if (this.filterDtsFiles && path.endsWith('.d.ts')) return null;
+
 		// Retrieve the name of the file, return null if empty.
 		const name = basename(path, extension);
 		if (name === '') return null;