feat: Exported component interfaces

Author: KnisterPeter

Diff for: index.ts

@@ -368,7 +368,7 @@ export class Generator {
 
   public interface(name: string, fn: () => void): void {
     this.indent();
-    this.code += `interface ${name} {`;
+    this.code += `export interface ${name} {`;
     this.nl();
     this.indentLevel++;
     fn();

Diff for: tests/es6-class.d.ts

@@ -2,7 +2,7 @@ declare module 'component' {
 	import * as React from 'react';
 	import Message from './path/to/Message';
 
-	interface ComponentProps {
+	export interface ComponentProps {
 		key?: any;
 		/**
 		 * This is a jsdoc comment for optionalAny.

Diff for: tests/es7-class.d.ts

@@ -2,7 +2,7 @@ declare module 'component' {
 	import * as React from 'react';
 	import Message from './path/to/Message';
 
-	interface ComponentProps {
+	export interface ComponentProps {
 		key?: any;
 		/**
 		 * This is a jsdoc comment for optionalAny.

Diff for: tests/generator-test.ts

@@ -26,7 +26,7 @@ describe('The Generator', () => {
   });
   it('should write a property interface', () => {
     generator.props('Name', {prop: {type: 'type', optional: true}});
-    assert.equal(generator.toString(), 'interface NameProps {\n\tkey?: any;\n\tprop?: type;\n}\n');
+    assert.equal(generator.toString(), 'export interface NameProps {\n\tkey?: any;\n\tprop?: type;\n}\n');
   });
   it('should write a class with props declaration', () => {
     generator.class('Name', true);