feat(SebmGoogleMap): Add attribute „clickableIcons“ to map

[demianh]

This pull request adds the map option "clickableIcons" to the map as described in https://developers.google.com/maps/documentation/javascript/3.exp/reference#MapOptions

[demianh]

The following lines from CONTRIBUTING.md were not very clear to me:

Create your patch, including appropriate test cases.
Run the full angular-google-maps test suite with npm run build & npm run test and ensure that all tests pass.

Are there even any tests? Where do i add them?

Running the tests with npm run test throws an error for me:

WebpackOptionsValidationError: Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.

Same seems to happen on the CI too...

[sebholstein]

@demianh thank you! LGTM. I will check the webpack configuration. When the build is green, I will merge your PR.

[sebholstein]

Closed with 9960522