Thanks and minor suggestion

[DannyBen]

Hey, this is a great life saving gem. It brings the nice RSpec expectations easily and intuitively into my Rails projects, so thanks for that.

One thing I noticed - it is hard to find this gem. Searching "minitest mock expectations" does not show this repo anywhere in the first pages, and I don't remember even how I did find it - perhaps changing the README H1 to "Minitest Mock Expectations" will help Google?

[bogdanvlviv]

@DannyBen Thanks you for the suggestion. I just changed the h1 in 83f97c2.

Actually, I expect that merging minitest/minitest#781 will help to find this gem as well.