refactor(Select): export the select animations

ngPackagr needs all items exported and this one was missed. It was discovered while tracking down
the same issue in another module.

terminus-ui/select/src/select.module.ts

@@ -26,6 +26,7 @@ import { TsSelectOptionDisplayDirective } from './option/option-display.directiv
 
 export * from './select.component';
 export * from './select-trigger.component';
+export * from './select-animations';
 export * from './option/option.component';
 export * from './option/option-display.directive';
 export * from './optgroup/optgroup.component';