Add shortHand and d.ts files for InputMask

exports/inputmask.d.ts

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+export * from './components/inputmask/InputMask';

exports/inputmask.js

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+'use strict';
+module.exports = require('./components/inputmask/InputMask.vue');

src/components/inputmask/InputMask.d.ts

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+import Vue, { VNode } from 'vue';
+
+export declare class InputMask extends Vue {
+    value?: string;
+    $emit(eventName: 'input', value: string): this;
+    $emit(eventName: 'focus', event: Event): this;
+    $emit(eventName: 'blur', event: Event): this;
+    $emit(eventName: 'keydown', event: Event): this;
+    $emit(eventName: 'keypress', event: Event): this;
+    $emit(eventName: 'paste', event: Event): this;
+    $emit(eventName: 'complete', event: Event): this;
+}