tgram:// supports chat_id:topic arguments

[caronc]

Description:

Related issue (if applicable): #1021

Telegram plugin supports: tgram://{chat_id}:{topic} now (using a colon (:) as a delimiter. Hence the following is valid too: tgram://{chat_id}:{topic}/{chat_id2}:{topic2}/...

Topics are purely optional

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@1021-telegram-chatid-to-topics

# Test out the changes with the following command:
apprise -t "Test Title" -b "Test Message" \
     "tgram://credentials/chat_id:topic"

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9dcf769) 99.27% compared to head (ac4c94a) 99.27%.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1028   +/-   ##
=======================================
  Coverage   99.27%   99.27%           
=======================================
  Files         136      136           
  Lines       17657    17669   +12     
  Branches     3603     3603           
=======================================
+ Hits        17529    17541   +12     
  Misses        119      119           
  Partials        9        9           

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