Fix using HTML tags in ICU messages (#310) (#325)

The `ignoreTag` option was added specifically for this use case.
See also:
- https://formatjs.io/docs/intl-messageformat/#intlmessageformat-constructor
- formatjs/formatjs#1699

Resources/js/translator.js

@@ -133,7 +133,7 @@
                     throw new Error('The dependency "IntlMessageFormat" is required to use ICU MessageFormat but it has not been found. Please read https://github.com/willdurand/BazingaJsTranslationBundle/blob/master/Resources/doc/index.md#using-icu-messageformat')
                 }
 
-                var mf = new IntlMessageFormat.IntlMessageFormat(_message);
+                var mf = new IntlMessageFormat.IntlMessageFormat(_message, undefined, undefined, {ignoreTag: true});
 
                 return mf.format(parameters || {});
             }