0.7.0

fix

• fixed the documentation of .tmcproject.yml for no-tests

change

• updated tmc-csharp-runner to 1.1 which uses dotnet 5.0, also updated C# tests to 5.0
• now detects when tmc-csharp-runner is updated and deletes the old directory and re-extracts if it has been updated
• switched plugin tests to use simple_logger instead of env_logger
• consider sqlite3 files to be binary files in submission processing
• exercises are downloaded in parallel using max 4 threads

etc

• added notes for updating external dependencies
• refactored plugins, especially tests
• updated Python TMC in the Python plugin tests and added a file to keep track of when it's been updated