[Pharo-project] added bitmapCharacterSet to STHUB and CI :)

Hi in my slow but steady effort to migrate important project to SmalltalkHub and add CI to cover them, I migrated BitmapCharacterSet (adding configuration of …) I updated the XMLWriter ci configruation to point to PharoExtras. I added one CI job for OrderPreservingDictionary I love https://ci.inria.fr/pharo-contribution/ So next step is XMLParser and Pastell. Stef