Moved to Null Safety

[3htsham]

Moved the project to null safety

[longtimedeveloper]

@3htsham thank you for this work, much appreciated!

[longtimedeveloper]

@3htsham I found one issue that is easy to correct.

From this file: aescrypt.dart

For this function: Future<String> decryptTextFromFile(String srcFilePath, {bool utf16 = false, Endian endian = Endian.big}) async {

Change this line: final Uint8List decData = await decryptDataFromFileSync(srcFilePath);

To: (changing the call to an async call instead of synchronous.) final Uint8List decData = await decryptDataFromFile(srcFilePath);

Best regards,

Karl

[PeterAkande]

The complaint of that "this package isn't null safe still persists", even if this package is used.

[longtimedeveloper]

@PeterAkande I'm using this pull request with my above change, works great. Granted there are a few corrections you may need to make to get the code super clean, but I've got it running great.

[PeterAkande]

Okay, Thanks.

[longtimedeveloper]

@PeterAkande Forgot to mention. I used GitHub Desktop to check out this pull request. This tool makes it a breeze to check out a pull request that has not yet been merged.

[busslina]

@longtimedeveloper Hello, so your branch is ready to be used?

There is also this package: https://pub.dev/packages/aes_crypt_null_safe