bump version to 2.3.0-SNAPSHOT

[nobodyiam]

What's the purpose of this PR

bump version to 2.3.0-SNAPSHOT

Follow this checklist to help us incorporate your contribution quickly and easily:

• [x] Read the Contributing Guide before making this pull request.
• [x] Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• [ ] Write necessary unit tests to verify the code.
• [x] Run mvn clean test to make sure this pull request doesn't break anything.
• [ ] Update the CHANGES log.

[codecov[bot]]

Codecov Report

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

Comparison is base (ee1517b) 49.61% compared to head (788c680) 49.64%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #5049 +/- ## ============================================ + Coverage 49.61% 49.64% +0.03% + Complexity 1907 1905 -2 ============================================ Files 372 372 Lines 11559 11559 Branches 1127 1127 ============================================ + Hits 5735 5739 +4 + Misses 5481 5479 -2 + Partials 343 341 -2 ```

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