Protostar 0.2.1

Changelog

added deploy command
added support for configuration profiles
updated start_prank to support contracts deployed by deploy_contract cheatcode
updated cairo-lang to version 0.8.2.1
updated test collector to load tests to the memory before running tests, what allows working on the project and running tests at the same time
renamed main directory from src to protostar
removed --match flag of test command
fixed exit codes (Protostar used to return exit code 0 despite failing tests)

Run protostar upgrade.
In case of issues, run the following script:

curl -L https://raw.githubusercontent.com/software-mansion/protostar/master/install.sh | bash