New tslint rules

[LogvinovLeon]

Description

• Upgrade tslint to the newest version
• Add new rules:
  • 4227aaa
• Fixes linter failures after adding new rules

Most notable changes:

• prefer-readonly rule requires readonly attr for readonly properties.
• no-invalid-this
  • This rule helped us find a bug when we were overriding a this context of an already bound react prop in the dialog

Testing instructions

yarn lint

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• Change requires a change to the documentation.
• Added tests to cover my changes.
• Added new entries to the relevant CHANGELOG.jsons.
• Labeled this PR with the 'WIP' label if it is a work in progress.
• Labeled this PR with the labels corresponding to the changed package.

[coveralls]

Coverage decreased (-0.01%) to 83.811% when pulling bf8ac3b on feature/tslint-improvements into a9038f2 on v2-prototype.