fix(typeahead): correctly higlight numeric matches

Fixes #1777

src/typeahead/test/typeahead-highlight.spec.js

@@ -32,4 +32,8 @@ describe('typeaheadHighlight', function () {
   it('issue 316 - should work correctly for regexp reserved words', function () {
     expect(highlightFilter('before (match after', '(match')).toEqual('before <strong>(match</strong> after');
   });
+
+  it('issue 1777 - should work correctly with numeric values', function () {
+    expect(highlightFilter(123, '2')).toEqual('1<strong>2</strong>3');
+  });
 });

src/typeahead/typeahead.js

@@ -344,6 +344,6 @@ angular.module('ui.bootstrap.typeahead', ['ui.bootstrap.position', 'ui.bootstrap
     }
 
     return function(matchItem, query) {
-      return query ? matchItem.replace(new RegExp(escapeRegexp(query), 'gi'), '<strong>$&</strong>') : matchItem;
+      return query ? ('' + matchItem).replace(new RegExp(escapeRegexp(query), 'gi'), '<strong>$&</strong>') : matchItem;
     };
   });