Adding new EsLint rules

[christian-bromann]

Proposed changes

After reviewing #9124 we encountered a lot of review cycles that could have been prevented by setting these two eslint rules: eqeqeq, prefer-const, consistent-type-imports and dot-notation. This patch enforces these coding conventions so we can review more efficient next time.

Types of changes

• Improving internal coding conventions
• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• I have added proper type definitions for new commands (if appropriate)

Further comments

Reviewers: @webdriverio/project-committers