Release 6.5.3

Rebuild yarn to remove outdated references to old deps

Move the ability to add attachments into angular-point instead of rel…

…ying on angular-point-attachments.

Use enum and union types for better field type definitions.

Merge branch 'master' of https://github.com/scatcher/angular-point

Set correct version.

Expose additional interfaces. Minor bump.

Major bump because we're now using string enums wich is only supporte…

…d in the latest versions of typescript.

Remove unnecissary return type.

Update types to eliminate tslint warnings.