Update CHANGELOG.md and pom.xml for v0.18

[tsotnet]

Signed-off-by: Tsotne Tabidze tsotne@tecton.ai

What this PR does / why we need it: Necessary for version bump

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

NONE

[codecov-commenter]

Codecov Report

Merging #2283 (e98e845) into master (69ec981) will decrease coverage by 27.39%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #2283       +/-   ##
===========================================
- Coverage   85.98%   58.59%   -27.40%     
===========================================
  Files         116      116               
  Lines        9810     9810               
===========================================
- Hits         8435     5748     -2687     
- Misses       1375     4062     +2687     

Flag	Coverage Δ
integrationtests	?
unittests	58.59% <ø> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../integration/online_store/test_universal_online.py	15.00% <0.00%> (-82.92%)	⬇️
.../integration/online_store/test_online_retrieval.py	17.39% <0.00%> (-82.61%)	⬇️
sdk/python/tests/utils/online_read_write_test.py	20.68% <0.00%> (-79.32%)	⬇️
...fline_store/test_universal_historical_retrieval.py	23.50% <0.00%> (-76.50%)	⬇️
...gration/registration/test_feature_service_apply.py	31.25% <0.00%> (-68.75%)	⬇️
sdk/python/feast/infra/online_stores/redis.py	26.45% <0.00%> (-68.39%)	⬇️
sdk/python/tests/integration/e2e/test_usage_e2e.py	33.87% <0.00%> (-66.13%)	⬇️
sdk/python/feast/infra/utils/snowflake_utils.py	23.36% <0.00%> (-65.43%)	⬇️
sdk/python/tests/data/data_creator.py	34.78% <0.00%> (-65.22%)	⬇️
...dk/python/tests/integration/e2e/test_validation.py	35.18% <0.00%> (-64.82%)	⬇️
... and 60 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 69ec981...e98e845. Read the comment docs.

[adchia]

/lgtm

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: adchia, tsotnet

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [adchia,tsotnet]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment