fix: adds AutoCompleteStyles to exports

Added export for AutoCompleteStyles to allow for creation of object that
can be shared where multiple instances of the component need shared
styling.

src/index.ts

@@ -8,6 +8,7 @@ import {AutoCompleteComponent} from './auto-complete/auto-complete.component';
 import {BoldPrefix} from './bold-prefix.pipe';
 
 export * from './auto-complete-options.model';
+export * from './auto-complete-styles.model';
 
 export * from './auto-complete.service';