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) {

index.android.js を開き、index.ios.js の for-of ループと添付ファイルの処理を比較します。要求された反復処理の変更を確認し、Android で添付ファイルの配列を使用してメールを作成するテストを行います。添付ファイルによって報告された indexOf エラーが発生しなくなれば完了です。