v0.3.0

• Add roaringbitmap.output_format parameter to control 'bytea' or 'array' output format
• Change roaringbitmap default output format to 'bytea' in order to better support large cardinality bitmaps
• Add rb_iterate() function and fix memory leak
• Add roaringbitmap.output_format parameter

v0.3.0 change roaringbitmap default output format to 'bytea' , to return to the previous output format, set the parameters set roaringbitmap.output_format='array'