Fixed Bug where in a pipelined request, if the response of n'th request is needed by any other request where n > 9, i.e. a single digit number, it will work as expected.

[adisingh007]

Closes #97

The problem was in internals.requestRegex.

Where the regex was:

/(?:\/)(?:\$(\d)+\.)?([^\/\$]*)/g  

I changed it to:

/(?:\/)(?:\$(\d+)\.)?([^\/\$]*)/g  

So in the previous buggy regex, \d was in 1 capturing regex group as the + was outside that group.
So I put \d+ in the same capturing group.

I also created a test case for the same. All test cases are working.

[cadecairos]

Good find @adisingh007! Thank you!