Brownie - rebuild / expand CLI test cases

The Issue

1. The test cases in tests/cli/test_cli_main.py are poorly designed. Tests are using a custom class CliTester which provides a similar functionality to monkeypatch.setattr and mocker.spy, but is difficult to understand on first glance.
2. Test coverage for some cli modules is lacking, especially brownie/_cli/analyze.py and brownie/_cli/ethpm.py.

Completion Requirements

1. Rewrite tests in tests/cli/test_cli_main.py to use monkeypatch and pytest-mock. The CliTester class should no longer exist.
2. Increase test coverage for all files in brownie/_cli/ to >=90%

Implementation Notes

Functionality that is exists outside of the brownie/_cli/ folder is already covered elsewhere in the test suite. To maximize speed of the tests, you should patch these methods. The important thing is to verify that the CLI is correctly calling the intended methods.

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Issue Status: 1. Open 2. Started 3. Submitted 4. Done

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[agbilotia1998]

@iamdefinitelyahuman sure, will let you know.