composing email with attachments fails on Android (fix provided)

@nativescript/Email v2.0.5

Error
Calling email.compose with array 'attachments' fails with this error:
JS: 'Error in email.compose: TypeError: Cannot read property 'indexOf' of undefined'

Problem
The problem is that 'compose' in "index.android.js" parses attachments using a "for-in" loop. My array created via brackets in JS has a 'move' method by default, and so this for-in loop parses 'attachments[move]' which fails.

Fix
The fix is simply to change it to a "for-of" loop, as is the case in "index.ios.js".
Replace this...
for (const a in arg.attachments) {
const attachment = arg.attachments[a];
with this...
for (const attachment of arg.attachments) {

打开 index.android.js，并将其附件处理方式与 index.ios.js 中的 for-of 循环进行比较。验证请求的迭代更改，并在 Android 上测试使用附件数组撰写电子邮件；完成的标准是附件不再触发报告的 indexOf 错误。