Poetry Implementation

[neolight1010]

closes #198

Changes Proposed

• Using a proper dependency management tool: Poetry.

Also, a small change to install.sh should fix relative import errors when using that method of installation.

Other minor changes:

• Required Python version is ^3.7
• Changed Dockerfile Python version.
• Changed TravisCI distro and Python version.
• Added .vscode and .venv to .gitignore.
• Fix a typo in link.py

Explanation of Changes

Currently, TorBot uses a simple pip freeze and requirements.txt method for managing its dependencies. This has led to some issues, like #177. With the use of a proper dependency management tool, this can be avoided.

Also, issue #198 is resolved by a adding a --paths flag to the pyinstaller command in install.sh. This also fixes the same error when trying to run the Docker image of the app.

Screenshots of new feature/change

[neolight1010]

There are some fields in both of the pyproject.toml files that I don't know whether they are right or not. These are: version, authors, and license.