Add more exceptions to 'no-unbound-method'

[andy-hanson]

PR checklist

• Addresses an existing issue: no-unbound-method errors even for non-problematic references #2128
• New feature, bugfix, or enhancement
  • Includes tests
• Documentation update

What changes did you make?

• Allow property access.
• Allow binary expression (except ||).

[IllusionMH]

Interesting case with forEach. It and other array methods that take this reference as last parameter provide similar functionality.

However as I can see from typings in lib.d.ts it is not possible to distinguish such methods from other :(

[nchen63]

@andy-hanson thanks!