fix(typescript): Generic errors with TS2.4

Author: Christoph Bühler

src/SymbolSpecifier.ts

@@ -8,7 +8,7 @@ import { Clonable } from './clonable/Clonable';
  * @class SymbolSpecifier
  * @implements {Clonable}
  */
-export class SymbolSpecifier implements Clonable {
+export class SymbolSpecifier implements Clonable<SymbolSpecifier> {
     constructor(public specifier: string, public alias?: string) { }
 
     /**

src/clonable/Clonable.ts

@@ -2,16 +2,16 @@
  * Interface for clonable objects. The clone() method creates a deep clone of the object.
  * 
  * @export
+ * @template T
  * @interface Clonable
  */
-export interface Clonable {
+export interface Clonable<T> {
     /**
      * Create a deep clone of this object.
      * 
-     * @template T
      * @returns {T}
      * 
      * @memberof Clonable
      */
-    clone<T>(): T;
+    clone(): T;
 }

src/imports/Import.ts

@@ -8,7 +8,7 @@ import { Node } from '../Node';
  * @export
  * @interface Import
  */
-export interface Import extends Clonable, Node {
+export interface Import extends Clonable<Import>, Node {
     /**
      * Indicates if the given import is "new" or a parsed one.
      *