Yunchao/upcoming future date only

[tanyunchao]

fixes #74

• Added additional check for dates to be after now() before being initiated as an Upcoming
• Edited LastContact.java to use isBefore instead of !isAfter
• Updated dummy test data

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 78.15%. Comparing base (a6282fc) to head (2c21461).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #100 +/- ## ========================================= Coverage 78.15% 78.15% + Complexity 571 570 -1 ========================================= Files 89 89 Lines 1753 1753 Branches 173 172 -1 ========================================= Hits 1370 1370 Misses 350 350 Partials 33 33 ```

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