fix(types): Mark FileWriter.write to support ArrayBuffer data

[peitschie]

FileWriter.js clearly supports this type, and it allows memory conscious users to avoid unnecessary duplication of the memory as occurs when using a Blob.

Platforms affected

Type-only change

Motivation and Context

Avoid forcing unnecessary duplication of memory when attempting to write files

Description

Clarifies FileWriter.write type definition to properly reflect the method's support for an ArrayBuffer type directly:

cordova-plugin-file/www/FileWriter.js

Line 156 in c883998

isBinary = supportsBinary && (data instanceof ArrayBuffer);

Testing

Type-only change. Have confirmed new type behaves correctly with code passing in an ArrayBuffer.

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[breautek]

The unit tests have been broken so I think they can be ignored for this PR, and this change wouldn't cause breakage either.