Description:

Related issue (if applicable): Discord Request

This Pull Request allows you to add whatsapp:phoneno as target phone numbers in twillio. this will only work if you're hooked up with Twillio through them.

For example:

• twilio://credentials/whatsapp:555-555-5555 would send the message though Whatsapp instead of the regular Twillio Infrastructure.

You can also shorten the code to just be w: (no need to spell out whatsapp:). Long naming is preserved so it aligns with Twilio documentation.

You can chain more phone numbers if you wish to as well:

• twilio://credentials/w:555-555-5555/w:555-555-1234/

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• No lint errors (use flake8)
• 100% test coverage

Testing

Anyone can help test this source code as follows:

# Create a virtual environment to work in as follows:
python3 -m venv apprise

# Change into our new directory
cd apprise

# Activate our virtual environment
source bin/activate

# Install the branch
pip install git+https://github.com/caronc/apprise.git@twilio-whatsapp-support

# Test out the changes with the following command:
apprise -t "Test Title" -b "Test Message" \
  "twilio://credentials/target-no"