Verify "Largest Series Product" exercise implementation

[kytrinyx]

There was some confusion in this exercise due to the ambiguous use of the term consecutive in the README. This could be taken to mean contiguous, as in consecutive by position, or as in consecutive numerically. The the README has been fixed (exercism/problem-specifications#200).

Please verify that the exercise is implemented in this track correctly (that it finds series of contiguous numbers, not series of numbers that follow each other consecutively).

If it helps, the canonical inputs/outputs for the exercise can be found here:
https://github.com/exercism/x-common/blob/master/largest-series-product.json

If everything is fine, go ahead and just close this issue. If there's something to be done, then please describe the steps needed in order to close the issue.

[petertseng]

Yes. https://github.com/exercism/xgo/blob/master/exercises/largest-series-product/cases_test.go#L14

2 and 9 are not consecutive.

[petertseng]

series is good too https://github.com/exercism/xgo/blob/master/exercises/series/series_test.go#L41

[kytrinyx]

I didn't even realize series had similar problems.