Add support for component-based modals

[DougKeller]

Our team is preparing for our transition from AngularJS to Angular X. As part of this process, we've begun componentizing as many things as we can.

AngularModalService does not support AngularJS 1.5.x+ components. This PR aims to change that.

New modal options:

• component
  • This will dynamically build and assign controller and template values to the options object to eliminate the need to define these manually.
• bindings
  • If the component option is provided, bindings will be bound to the generated template as binding attributes, and will be assigned to the dynamically-created controller's scope in order to provide these values to the component.

I've added tests, documentation, and comments describing this change. It will not have an effect on any existing usage of this ModalService.

Example usage:

ModalService.showModal({
  component: 'myComponent',
  bindings: {
    name: 'Foo',
    myRecord: { id: '123' }
  }
});

This will display a new modal with myComponent as the template and all values specified by the bindings option will be forwarded the the rendered component.

[codecov[bot]]

Codecov Report

Merging #266 into master will increase coverage by 2.31%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #266      +/-   ##
==========================================
+ Coverage   86.23%   88.54%   +2.31%     
==========================================
  Files           1        1              
  Lines         109      131      +22     
==========================================
+ Hits           94      116      +22     
  Misses         15       15

Impacted Files	Coverage Δ
src/angular-modal-service.js	88.54% <100%> (+2.31%)	:arrow_up:

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[dwmkerr]

This is excellent @DougKeller - I can't wait to get this working with Angular X. I'm cloning the PR locally and running some tests, will get back to you soon!

[DougKeller]

Glad you like it! Just to clarify, I'm not sure that this will work with Angular X components, however it allows existing AngularJS modals to use AngularJS 1.5.x components rather than controllers, which will hopefully make it easier to switch to some sort of component-based Angular X modal service in the future.

[dwmkerr]

Sorry for the delay Doug - it's in, it's published, thanks so much for your contributions!