Release 0.12.0

Continious Integration:

• ci: update setup-node versions

Build:

• build: added minimum required node version

Chore:

• chore: incremented version
• chore(relations): updated instanceof check to current class
• chore(deps-dev): updated dependencies

Refactor:

• refactor(services): simplified logic

Feature:

• feat(helpers): added retry function

Fix:

• fix(helpers): make transformKeys handle array of objects

Testing:

• test(helpers): renamed missed function rename

Documentation:

• docs(helpers): documented retry function
• docs(helpers): documented transformKeys function
• docs(helpers): updated jsdoc param to latest info
• docs(factory): fixed indentation