Fix typos #157

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3 errors and 3 warnings

test ignore_urls option works with request headers (ExVCR.IgnoreUrlsTest)

test post with multipart data (ExVCR.Adapter.HackneyTest)

test passthrough works after cassette has been used (ExVCR.Adapter.HackneyTest)

Supervisor.Spec.supervise/2 is deprecated. Use the new child specifications outlined in the Supervisor module instead

Attempt 1 failed. Reason: Child_process exited with error code 1

Attempt 2 failed. Reason: Child_process exited with error code 1