Update paired-end diff to skip this test.

Venkat Malladi
2019-09-17T06:03:17-05:00

Closes #65

Please fill in the appropriate checklist below (delete whatever is not relevant).
These are the most common things requested on pull requests (PRs).

## PR checklist
- [X] This comment contains a description of changes (with reason)
- [X] If you've fixed a bug or added code that should be tested, add tests!
- [X] `CHANGELOG.md` is updated