[FEATURE] 508/screen reader support for mat-select-search-input

[tonyholt]

When utilizing the 508 testing tool WAVE for Chrome, there's an issue where the mat-select-search-input does not have a label. This may also be an issue when utilizing screen reading for the mat-select-search.

Could we add an @input string to optionally supply an aria-label for the mat-select-search input? We could default it to "dropdown search". This way, the screen readers and other 508 tools will not have issue with this textbox. I have a commit on a fork that illustrates where I'd like the input to be utilized:

https://github.com/tonyholt/ngx-mat-select-search/blob/6ec0468f8401d864d16660a607727115f4ecb468/src/app/mat-select-search/mat-select-search.component.html#L17

[macjohnny]

sounds good. do you want to open a PR for this?

[tonyholt]

Sure. I didn't fully build out the @input, but I will try that out and issue a PR with my changes. Thank you for the quick response

[macjohnny]

reminder: please add the input to https://github.com/bithost-gmbh/ngx-mat-select-search/blob/master/README.md#inputs

[macjohnny]

@tonyholt do you think you can implement/test this until tomorrow? if so, I would wait and include it in the next release.

[tonyholt]

@macjohnny, we can wait until the next release. I'll hopefully create the PR soon.

[macjohnny]

@tonyholt any update on this?

[tonyholt]

#142

Sorry for the delay on this.