Add option to render summary as markdown table

[andrcuns]

Implements #290

[codeclimate]

Code Climate has analyzed commit 1bd3b5a and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 99.0% (0.0% change).

View more on Code Climate.

[github-actions]

Allure report

allure-report-publisher generated test report!

rspec: ✅ test report for 1bd3b5a5

	passed	failed	skipped	flaky	result
helpers	41	0	0	0	✅
providers	15	0	0	0	✅
uploaders	17	0	0	0	✅
generator	3	0	0	0	✅
cli	1	0	0	0	✅
commands	19	0	0	0	✅
-----------	--------	--------	---------	-------	--------
Total	96	0	0	0	✅