Fix #1891, and refactor all tests in assocations/has-many.test.js to use promises <3
Fix a couple of timing issues in tests related to mariadb
Pleasing code climate, abstracting duplicated code
[ci skip] Change coverage badge to code climate
Update changelog.md

fix format
Merge pull request #1995 from youxiachai/patch-1

Update changelog.md
Support for multiple savepoints
Modified model aggregate method to support distinct option and added test to test/dao-factory.test.js
feat: add ilike support for postgres
Merge pull request #2008 from alekbarszczewski/distinct-support

Added support for distinct option in Model.aggregate method
Merge pull request #2010 from meetearnest/ilike

ILIKE support for postgres
Added API docs for #2008
[ci skip] Mention the distinct option for aggregate on count
Simplify parameter validation and deprecation
Merge pull request #2000 from janmeier/multipleSavepoints

Support for multiple savepoints
Merge pull request #1994 from seegno/simplify-parameter-validator

Simplify parameter validation and deprecation
Check for an empty validation error message. Closes #2009