Update README.md

#150
Merge pull request #152 from mreinstein/patch-1

Update README.md
fix issue 154 - post with superagent
v0.27.3
proxy error events when proxying a streamed response
add the basics so that you can delay the initial connection happening
duplicate some tests and call delayConnection instead of delay
Merge pull request #161 from danjenkins/master

Enable nock to delay the connection itself
v0.28.0
Merge pull request #157 from spenceralger/emit_stream_errors

proxy error events when proxying a streamed response
adding in docs for delayConnection
Merge pull request #162 from danjenkins/master

adding in docs for delayConnection
v0.28.1
only testing latest stable node on travis
v0.28.2
Merge branch 'master' of https://github.com/pgte/nock